CVE-2026-96512

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-23. A secondary CVSS source baseline 7.8; 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-2026-85290 (ENISA EUVD) · GHSA-jj2h-hcrf-9gfx (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
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: 0.3%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing 'Z' timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Because sudo is a setuid-root program, an unprivileged local user can set TZ to an extreme timezone offset to shift the authorization window by up to approximately 25 hours, causing expired rules to be treated as valid. This allows the user to execute commands outside the intended time window. Authentication is not bypassed; only the time-based authorization check is affected.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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
0.3%
EPSS %ILE
25th
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% 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

September 23, 2026

Last Modified

October 29, 2026

Advisory Details (3)

Auto-updated Sep 23, 2026
Patch available. Sources: redhat, github_commit.
GitHub commit

commit 1820a3496875 (sudo-project/sudo)

Fix landed in sudo-project/sudo commit 1820a3496875 — awaiting tagged release

https://github.com/sudo-project/sudo/commit/1820a349687522f51023d1ae5925125f59679a8c
Red Hat

2539327 – (CVE-2026-96512) CVE-2026-96512 sudo: sudo: TZ environment variable allows bypass of NOTBEFORE/NOTAFTER time-based authorization

https://bugzilla.redhat.com/show_bug.cgi?id=2539327
Red HatMentions a patch (unverified)

CVE-2026-96512 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-96512

Patch Availability(12)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatsudo-0:1.8.29-7.el8_4.42026-10-29redhat
ubuntusudo (1.9.17p2-1ubuntu3.2) @ resolute2026-10-29ubuntu
redhatsudo-0:1.9.5p2-9.el9_2.52026-10-26redhat
redhatsudo-0:1.9.15-8.p5.el10_0.52026-10-22redhat
redhatsudo-0:1.9.5p2-1.el8_8.42026-10-21redhat
redhatsudo-0:1.9.5p2-10.el9_4.42026-10-21redhat
redhatsudo-0:1.9.5p2-10.el9_6.42026-10-21redhat
redhatrhui5/rhua-rhel9:17919786932026-10-14redhat
redhatsudo-0:1.9.5p2-2.el8_102026-10-05redhat
redhatsudo-0:1.9.17p2-3.el9_8.32026-10-05redhat
redhatsudo-0:1.9.17-10.p2.el10_2.72026-10-05redhat
redhatsudo-main-1.9.17-16.p2.2.hum12026-09-24redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
sudo1.9.13p3-1 ... 1.9.17p2-9 (34 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
sudo1.9.16p2-3 ... 1.9.17p2-9 (14 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
sudo1.9.16p2-3 ... 1.9.17p2-8 (11 versions)
  • every version up to 1.9.17p2-9: fixed in 1.9.17p2-9
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 34× in last 7d / 160× 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 235 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 135 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  4. 2026-10-29 20:26 UTCEG score recompute
  5. 2026-10-29 20:26 UTCVendor advisory
  6. 2026-10-29 20:26 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-29 20:01 UTCEG score recompute
  8. 2026-10-29 20:01 UTCVendor advisory
  9. 2026-10-29 20:01 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  10. 2026-10-29 19:26 UTCEG score recompute
  11. 2026-10-29 19:26 UTCVendor advisory
  12. 2026-10-29 19:26 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  13. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  14. 2026-10-29 13:26 UTCEG score recompute
  15. 2026-10-29 13:26 UTCVendor advisory
  16. 2026-10-29 13:26 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  17. 2026-10-29 12:23 UTCEG score recompute
  18. 2026-10-29 12:23 UTCVendor advisory
  19. 2026-10-29 12:23 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  20. 2026-10-29 10:26 UTCEG score recompute
  21. 2026-10-29 10:26 UTCVendor advisory
  22. 2026-10-29 10:26 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  23. 2026-10-29 09:23 UTCEG score recompute
  24. 2026-10-29 09:23 UTCVendor advisory
  25. 2026-10-29 09:23 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
Show 75 more
  1. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  3. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-10-26 14:38 UTCEG score recompute
  5. 2026-10-26 14:38 UTCVendor advisory
  6. 2026-10-26 14:38 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-26 14:03 UTCEG score recompute
  8. 2026-10-26 14:03 UTCVendor advisory
  9. 2026-10-26 14:03 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  10. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  11. 2026-10-25 13:48 UTCEG score recompute
  12. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-23 15:35 UTCEG score recompute
  15. 2026-10-23 15:35 UTCVendor advisory
  16. 2026-10-23 15:35 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  17. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-22 06:29 UTCEG score recompute
  19. 2026-10-22 06:29 UTCVendor advisory
  20. 2026-10-22 06:29 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  21. 2026-10-22 05:56 UTCEG score recompute
  22. 2026-10-22 05:56 UTCVendor advisory
  23. 2026-10-22 05:56 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  24. 2026-10-21 20:25 UTCEG score recompute
  25. 2026-10-21 20:25 UTCVendor advisory
  26. 2026-10-21 20:25 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  27. 2026-10-21 20:02 UTCEG score recompute
  28. 2026-10-21 20:02 UTCVendor advisory
  29. 2026-10-21 20:02 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  30. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  31. 2026-10-21 12:26 UTCEG score recompute
  32. 2026-10-21 12:26 UTCVendor advisory
  33. 2026-10-21 12:26 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  34. 2026-10-21 11:26 UTCEG score recompute
  35. 2026-10-21 11:26 UTCVendor advisory
  36. 2026-10-21 11:26 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  37. 2026-10-21 08:26 UTCEG score recompute
  38. 2026-10-21 08:26 UTCVendor advisory
  39. 2026-10-21 08:26 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  40. 2026-10-21 07:46 UTCEG score recompute
  41. 2026-10-21 07:46 UTCVendor advisory
  42. 2026-10-21 07:46 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  43. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  45. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-10-18 02:57 UTCEG score recompute
  47. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  49. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-10-14 19:33 UTCEG score recompute
  51. 2026-10-14 19:33 UTCVendor advisory
  52. 2026-10-14 19:33 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-10-14 19:10 UTCEG score recompute
  54. 2026-10-14 19:10 UTCVendor advisory
  55. 2026-10-14 19:10 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  56. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  57. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  58. 2026-10-13 04:08 UTCEG score recompute
  59. 2026-10-13 04:08 UTCVendor advisory
  60. 2026-10-13 04:07 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  61. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-10-12 14:40 UTCEG score recompute
  63. 2026-10-12 03:54 UTCVendor advisory
  64. 2026-10-12 03:54 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  65. 2026-10-11 19:11 UTCEG score recompute
  66. 2026-10-11 16:31 UTCVendor advisory
  67. 2026-10-11 16:31 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  68. 2026-10-11 16:27 UTCEG score recompute
  69. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  70. 2026-10-11 13:39 UTCEG score recompute
  71. 2026-10-11 05:09 UTCEG score recompute
  72. 2026-10-11 05:09 UTCVendor advisory
  73. 2026-10-11 05:09 UTCGHSA enrichmentGHSA-jj2h-hcrf-9gfx · GitHub severity HIGH · GitHub CVSS 7.8
  74. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  75. 2026-10-10 17:38 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-96512?
CVE-2026-96512 is a high-severity vulnerability; its CVE record was published on September 23, 2026. A flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing 'Z' timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Because sudo is a setuid-root program, an…
When was CVE-2026-96512 made public?
CVE-2026-96512 was made public on September 23, 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 September 23, 2026. EchelonGraph's copy of the record carries a last-modified date of October 29, 2026; the record at its source may have been updated since.
Is CVE-2026-96512 actively exploited?
CVE-2026-96512 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-96512?
CVE-2026-96512 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-96512?
A fix for CVE-2026-96512 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-96512 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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