CVE-2026-3497

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 7.5 from GitHub Security Advisory published 2026-03-12. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-11684 (ENISA EUVD) · GHSA-wcpp-3x59-h8vp (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
50
EG Risk 50/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation2.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.3%
EPSS %ILE
83rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
2.3% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 12, 2026

Last Modified

October 15, 2026

Advisory Details (10)

Auto-updated Jun 10, 2026
Patch available. Sources: ubuntu.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4535-1] openssh security update

https://lists.debian.org/debian-lts-announce/2026/04/msg00014.html
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/7
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/5
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/4
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/18/2
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/14/4
Web page

oss-security - Re: OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/14/3
Web page

oss-security - OpenSSH GSSAPI keyex patch issue

http://www.openwall.com/lists/oss-security/2026/03/12/3
Web page

oss-security - OpenSSH GSSAPI keyex patch issue

https://www.openwall.com/lists/oss-security/2026/03/12/3
UbuntuMentions a patch (unverified)

CVE-2026-3497 | Ubuntu

https://ubuntu.com/security/CVE-2026-3497

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntussh-askpass-gnome (1:10.0p1-5ubuntu5.1) @ questing2026-10-28ubuntu
redhatrhaiis/model-opt-cuda-rhel9:17806819842026-06-10redhat
redhatopenshift/ose-rhel-coreos-9:413.92.202605271328-02026-06-04redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202605271418-02026-06-04redhat
redhatopenshift/ose-rhel-coreos-9:416.94.202605200242-02026-05-29redhat
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202605201155-02026-05-27redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202605112123-02026-05-20redhat
redhatrhaiis/vllm-cuda-rhel9:17792236542026-05-20redhat
redhatrhaiis/vllm-rocm-rhel9:17792236512026-05-20redhat
redhatopenshift/ose-rhel-coreos-9:415.92.202605060220-02026-05-13redhat
redhatopenshift/ose-rhel-coreos-9:414.92.202605060243-02026-05-13redhat
redhatrhaiis/vllm-spyre-rhel9:17782445462026-05-12redhat
redhatopenssh-0:8.0p1-15.el8_6.42026-05-11redhat
redhatopenssh-0:8.0p1-7.el8_4.12026-05-11redhat
redhatopenshift/ose-rhel-coreos-9:418.94.202604240015-02026-05-11redhat
redhatrhaiis/vllm-cuda-rhel9:17782746662026-05-11redhat
redhatrhaiis/vllm-rocm-rhel9:17782445312026-05-11redhat
redhatrhaiis/model-opt-cuda-rhel9:17782445592026-05-11redhat
redhatopenssh-0:8.0p1-20.el8_8.32026-05-07redhat
redhatrhpam-7/rhpam-smartrouter-rhel8:7.13.5-4.17773257082026-05-05redhat
redhatopenssh-0:8.7p1-13.el9_0.22026-05-05redhat
redhatopenssh-0:8.7p1-30.el9_2.102026-04-27redhat
redhatrhui5/rhua-rhel9:17768688422026-04-23redhat
redhatopenssh-0:8.7p1-38.el9_4.72026-04-22redhat
redhatopenssh-0:8.7p1-45.el9_6.22026-04-21redhat
redhatopenssh-0:9.9p1-7.el10_0.22026-04-08redhat
redhatopenssh-0:8.0p1-28.el8_102026-04-02redhat
redhatopenssh-0:8.7p1-48.el9_72026-04-02redhat
redhatopenssh-0:9.9p1-13.el10_12026-04-02redhat
redhatopenssh-main-10.2p1-9.hum12026-03-23redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:8.4p1-5 ... 1:8.4p1-5+deb11u5 (6 versions)
  • every version up to 1:8.4p1-5+deb11u6: fixed in 1:8.4p1-5+deb11u6
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:9.2p1-2 ... 1:9.2p1-2+deb12u8 (9 versions)
  • every version up to 1:9.2p1-2+deb12u9: fixed in 1:9.2p1-2+deb12u9
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:10.0p1-7, 1:10.0p1-7+deb13u1
  • every version up to 1:10.0p1-7+deb13u2: fixed in 1:10.0p1-7+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:10.0p1-7 ... 1:10.2p1-6~bpo13+1 (11 versions)
  • every version up to 1:10.2p1-6: fixed in 1:10.2p1-6
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(5)

Data Freshness Timeline

(refreshed 10× in last 7d / 48× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 271 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 172 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  2. 2026-10-31 16:32 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  3. 2026-10-30 16:34 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  5. 2026-10-28 16:32 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  6. 2026-10-28 06:35 UTCEG score recompute
  7. 2026-10-28 06:35 UTCVendor advisory
  8. 2026-10-28 06:35 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  10. 2026-10-26 16:31 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 2.2% · 82nd percentile
  12. 2026-10-25 14:33 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  15. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  17. 2026-10-20 19:07 UTCEG score recompute
  18. 2026-10-20 19:07 UTCVendor advisory
  19. 2026-10-20 19:07 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  21. 2026-10-19 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  22. 2026-10-18 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  23. 2026-10-18 03:45 UTCEG score recompute
  24. 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  25. 2026-10-16 16:42 UTCEPSS rescoreEPSS 1.3% · 69th percentile
Show 74 more
  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  2. 2026-10-15 02:33 UTCVendor advisory
  3. 2026-10-15 02:33 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  4. 2026-10-15 02:25 UTCNVD updateCVSS v4 → 6.9
  5. 2026-10-15 01:37 UTCEG score recompute
  6. 2026-10-15 01:37 UTCVendor advisory
  7. 2026-10-15 01:37 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  8. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  9. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  10. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  11. 2026-10-12 16:12 UTCEG score recompute
  12. 2026-10-11 19:54 UTCEG score recompute
  13. 2026-10-11 17:07 UTCEG score recompute
  14. 2026-10-11 14:34 UTCEG score recompute
  15. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  18. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  20. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  23. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  26. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  27. 2026-09-28 01:19 UTCOSV refresh
  28. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  29. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  30. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  31. 2026-09-20 20:15 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  32. 2026-09-18 19:28 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  33. 2026-09-17 19:30 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  34. 2026-09-16 14:08 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  35. 2026-09-16 05:15 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  36. 2026-09-15 03:11 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  37. 2026-09-12 15:01 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  38. 2026-09-11 14:53 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  39. 2026-09-11 09:37 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  40. 2026-09-10 09:34 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  41. 2026-09-08 22:00 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  42. 2026-09-08 09:19 UTCEG score recompute
  43. 2026-09-08 09:19 UTCVendor advisory
  44. 2026-09-08 09:18 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  45. 2026-09-07 16:01 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  46. 2026-09-06 13:47 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  47. 2026-09-04 05:06 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  48. 2026-09-02 14:12 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  49. 2026-09-01 13:53 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  50. 2026-09-01 12:24 UTCEG score recompute
  51. 2026-09-01 12:24 UTCVendor advisory
  52. 2026-09-01 12:24 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  53. 2026-09-01 04:39 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  54. 2026-08-30 19:17 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  55. 2026-08-30 01:22 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  56. 2026-08-28 21:41 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  57. 2026-08-27 14:25 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  58. 2026-08-26 14:46 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  60. 2026-08-23 00:19 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  61. 2026-08-21 23:49 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  62. 2026-08-21 12:32 UTCEG score recompute
  63. 2026-08-21 12:32 UTCVendor advisory
  64. 2026-08-21 12:32 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  65. 2026-08-21 12:29 UTCMITRE cvelistV5CVSS v4 → 2.7
  66. 2026-08-20 22:55 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  67. 2026-08-19 17:03 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  68. 2026-08-18 13:48 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  69. 2026-08-17 13:47 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  70. 2026-08-16 14:56 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  71. 2026-08-16 11:41 UTCEG score recompute
  72. 2026-08-16 11:41 UTCVendor advisory
  73. 2026-08-16 11:41 UTCGHSA enrichmentGHSA-wcpp-3x59-h8vp · GitHub CVSS 7.5
  74. 2026-08-16 02:14 UTCEPSS rescoreEPSS 2.2% · 80th percentile

Frequently asked(5)

What is CVE-2026-3497?
CVE-2026-3497 is a high-severity vulnerability; its CVE record was published on March 12, 2026. Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the…
When was CVE-2026-3497 made public?
CVE-2026-3497 was made public on March 12, 2026: that is the date its CVE record's CNA, Canonical Ltd., gives for when the vulnerability was made public. The CVE record itself was published on March 12, 2026. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2026-3497 actively exploited?
CVE-2026-3497 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.3% probability of exploitation in the next 30 days (83rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-3497?
CVE-2026-3497 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-3497?
A fix for CVE-2026-3497 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-3497 are linked in the Vendor Advisories panel on this page.

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