CVE-2026-42011

HIGHPre-NVD 7.47.4
EchelonGraph scoreMEDIUM confidence

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

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. A secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — Patch released this week

Also known asEUVD-2026-28386 (ENISA EUVD) · GHSA-568w-37qx-3qc6 (GitHub Security Advisories)Source: ENISA EUVD

7.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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)
Severity74% × 45%
Impact severity (EG Severity): CVSS 7.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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.
EPSS PROB
0.5%
EPSS %ILE
41st
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 (7.4): severity, escalated by confirmed exploitation. This CVE's 7.4 is its impact severity (EG Severity), not escalated.

EG Severity
7.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

May 7, 2026

Last Modified

October 30, 2026

Advisory Details (2)

Auto-updated May 7, 2026
Patch available. Sources: redhat.
Red Hat

2467437 – (CVE-2026-42011) CVE-2026-42011 gnutls: gnutls: Security bypass due to incorrect name constraint handling

https://bugzilla.redhat.com/show_bug.cgi?id=2467437
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-42011

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift/ose-rhel-coreos-9:4.20.9.6.202610242033-02026-10-27redhat
redhatopenshift/ose-rhel-coreos-9:4.22.9.8.202610241758-02026-10-27redhat
redhatopenshift/ose-rhel-coreos-9:4.21.9.6.202610241345-02026-10-27redhat
redhatcert-manager/cert-manager-operator-bundle:17919662592026-10-14redhat
redhatcert-manager/cert-manager-operator-bundle:17919704842026-10-14redhat
redhatcert-manager/cert-manager-operator-rhel9:17917882872026-10-13redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17914597112026-10-13redhat
redhatcert-manager/cert-manager-istio-csr-rhel9:17914597592026-10-13redhat
redhatcert-manager/cert-manager-operator-rhel9:17890290762026-10-13redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17913710692026-10-13redhat
redhatrhai/base-image-neuron-rhel9:17907035422026-10-01redhat
redhatcert-manager/cert-manager-trust-manager-rhel9:17905985932026-09-28redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202608250221-02026-09-03redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202608241157-02026-09-03redhat
redhatopenshift/ose-rhel-coreos-9:416.94.202608150307-02026-08-31redhat
redhatopenshift/ose-rhel-coreos-9:418.94.202608142238-02026-08-26redhat
redhatrhui5/rhua-tp-rhel9:17872412602026-08-24redhat
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202607151909-02026-07-22redhat
redhatgnutls-0:3.3.29-9.el7_9.22026-07-22redhat
redhatgnutls-0:3.7.6-21.el9_2.72026-07-20redhat
redhatlibtasn1-0:4.13-3.el8_4.12026-06-29redhat
redhatlibtasn1-0:4.13-3.el8_6.22026-06-29redhat
redhatgnutls-0:3.8.3-4.el9_4.62026-06-29redhat
redhatlibtasn1-0:4.13-4.el8_8.12026-06-29redhat
redhatgnutls-0:3.8.3-6.el9_6.42026-06-25redhat
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatgnutls-0:3.8.9-9.el10_0.192026-06-16redhat
redhatrhui5/rhua-rhel9:17815257392026-06-16redhat
redhatgnutls-0:3.8.10-4.el9_82026-05-26redhat
redhatgnutls-0:3.8.10-4.el10_22026-05-26redhat

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

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.13-r0: fixed in 3.8.13-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.1-5 ... 3.7.1-5+deb11u9 (10 versions)
  • every version up to 3.7.1-5+deb11u10: fixed in 3.7.1-5+deb11u10
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.9-2 ... 3.7.9-2+deb12u6 (7 versions)
  • every version up to 3.7.9-2+deb12u7: fixed in 3.7.9-2+deb12u7
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.9-3, 3.8.9-3+deb13u1, 3.8.9-3+deb13u2, 3.8.9-3+deb13u3
  • every version up to 3.8.9-3+deb13u4: fixed in 3.8.9-3+deb13u4
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.10-1 ... 3.8.9-3 (11 versions)
  • every version up to 3.8.13-1: fixed in 3.8.13-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(12)

Data Freshness Timeline

(refreshed 22× in last 7d / 80× 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 100 of 425 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. None are among the latest 100 rows. The 325 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 0.5% · 41st percentile
  2. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  4. 2026-10-30 08:26 UTCEG score recompute
  5. 2026-10-30 08:26 UTCVendor advisory
  6. 2026-10-30 08:26 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  7. 2026-10-30 07:36 UTCEG score recompute
  8. 2026-10-30 07:36 UTCVendor advisory
  9. 2026-10-30 07:36 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  10. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-29 06:26 UTCEG score recompute
  12. 2026-10-29 06:26 UTCVendor advisory
  13. 2026-10-29 06:26 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  14. 2026-10-29 05:58 UTCEG score recompute
  15. 2026-10-29 05:58 UTCVendor advisory
  16. 2026-10-29 05:58 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  17. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-10-26 20:27 UTCEG score recompute
  20. 2026-10-26 20:27 UTCVendor advisory
  21. 2026-10-26 20:27 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  22. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-10-25 14:29 UTCEG score recompute
  25. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Show 75 more
  1. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-21 07:06 UTCEG score recompute
  5. 2026-10-21 07:06 UTCVendor advisory
  6. 2026-10-21 07:06 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  7. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-18 03:41 UTCEG score recompute
  11. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-10-14 20:33 UTCEG score recompute
  15. 2026-10-14 20:33 UTCVendor advisory
  16. 2026-10-14 20:33 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  17. 2026-10-14 19:38 UTCEG score recompute
  18. 2026-10-14 19:38 UTCVendor advisory
  19. 2026-10-14 19:38 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-10-14 04:28 UTCEG score recompute
  22. 2026-10-14 04:28 UTCVendor advisory
  23. 2026-10-14 04:28 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  24. 2026-10-14 03:36 UTCEG score recompute
  25. 2026-10-14 03:36 UTCVendor advisory
  26. 2026-10-14 03:36 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  27. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  28. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  29. 2026-10-12 16:07 UTCEG score recompute
  30. 2026-10-11 19:49 UTCEG score recompute
  31. 2026-10-11 17:03 UTCEG score recompute
  32. 2026-10-11 14:29 UTCEG score recompute
  33. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  34. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  35. 2026-10-10 00:18 UTCEG score recompute
  36. 2026-10-10 00:18 UTCVendor advisory
  37. 2026-10-10 00:18 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  38. 2026-10-09 23:36 UTCEG score recompute
  39. 2026-10-09 23:36 UTCVendor advisory
  40. 2026-10-09 23:35 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  41. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  42. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  43. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  44. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  45. 2026-10-06 01:28 UTCVendor advisory
  46. 2026-10-06 01:28 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  47. 2026-10-06 01:28 UTCEG score recompute
  48. 2026-10-06 01:28 UTCVendor advisory
  49. 2026-10-06 01:28 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  50. 2026-10-06 00:41 UTCEG score recompute
  51. 2026-10-06 00:41 UTCVendor advisory
  52. 2026-10-06 00:41 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  53. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  54. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  55. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  56. 2026-10-02 03:30 UTCEG score recompute
  57. 2026-10-02 03:30 UTCVendor advisory
  58. 2026-10-02 03:30 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  59. 2026-10-02 02:40 UTCEG score recompute
  60. 2026-10-02 02:40 UTCVendor advisory
  61. 2026-10-02 02:40 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  62. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  63. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  64. 2026-09-29 01:20 UTCEG score recompute
  65. 2026-09-29 01:20 UTCVendor advisory
  66. 2026-09-29 01:20 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  67. 2026-09-29 00:56 UTCEG score recompute
  68. 2026-09-29 00:56 UTCVendor advisory
  69. 2026-09-29 00:56 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  70. 2026-09-28 15:34 UTCEG score recompute
  71. 2026-09-28 15:34 UTCVendor advisory
  72. 2026-09-28 15:34 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4
  73. 2026-09-28 14:28 UTCEG score recompute
  74. 2026-09-28 14:28 UTCVendor advisory
  75. 2026-09-28 14:28 UTCGHSA enrichmentGHSA-568w-37qx-3qc6 · GitHub severity HIGH · GitHub CVSS 7.4

Frequently asked(5)

What is CVE-2026-42011?
CVE-2026-42011 is a high-severity vulnerability; its CVE record was published on May 7, 2026. A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate…
When was CVE-2026-42011 made public?
CVE-2026-42011 was made public on April 29, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on May 7, 2026. EchelonGraph's copy of the record carries a last-modified date of October 30, 2026; the record at its source may have been updated since.
Is CVE-2026-42011 actively exploited?
CVE-2026-42011 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42011?
CVE-2026-42011 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-42011?
A fix for CVE-2026-42011 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42011 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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