CVE-2026-95210

CRITICALPre-NVD 4.89.1
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than the CVSS score beside it.

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.8; sources differ by 4.3.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory

Also known asEUVD-2026-95139 (ENISA EUVD) · GHSA-9mfx-g534-q3pc (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

GnuTLS v3.8.13 does not reject a critical keyUsage extension when it cannot be processed, such as when extnValue is an ASN.1 NULL (05 00) instead of a BIT STRING. NOTE: the Supplier does not consider this an actionable security vulnerability because of its "threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)" policy.

CVSS v3
4.8
EG Score
9.1CRITICALmedium confidence
EG Risk
41
EG Risk 41/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.2%
EPSS %ILE
10th
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 (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). 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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 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 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

October 8, 2026

Last Modified

November 4, 2026

Advisory Details (1)

Auto-updated Oct 8, 2026
Patch available.
Web page

gist:4aad23689202720c4068f43b3c6069c7 · GitHub

https://gist.github.com/lkloliver/4aad23689202720c4068f43b3c6069c7

Vendor Advisories for CVE-2026-95210(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.9-2 ... 3.8.9-3 (45 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.10-1 ... 3.8.9-3+deb13u4 (16 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.8.10-1 ... 3.8.9-3 (12 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 87× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 165 rows 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 65 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-11-12 12:03 UTCEchelonGraph re-scored
  3. 2026-11-12 12:03 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-11-11 11:13 UTCEchelonGraph re-scored
  6. 2026-11-11 11:13 UTCVendor advisory
  7. 2026-11-11 11:13 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-11-10 16:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-11-10 10:24 UTCEchelonGraph re-scored
  10. 2026-11-10 10:24 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  11. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-11-09 09:35 UTCEchelonGraph re-scored
  13. 2026-11-09 09:35 UTCVendor advisory
  14. 2026-11-09 09:35 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  15. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  16. 2026-11-08 08:47 UTCEchelonGraph re-scored
  17. 2026-11-08 08:47 UTCVendor advisory
  18. 2026-11-08 08:47 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-11-07 07:55 UTCEchelonGraph re-scored
  21. 2026-11-07 07:55 UTCVendor advisory
  22. 2026-11-07 07:55 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-11-06 16:40 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-11-06 07:07 UTCEchelonGraph re-scored
  25. 2026-11-06 07:07 UTCVendor advisory
Show 75 more
  1. 2026-11-06 07:07 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  2. 2026-11-05 16:39 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  3. 2026-11-05 06:15 UTCEchelonGraph re-scored
  4. 2026-11-05 06:15 UTCVendor advisory
  5. 2026-11-05 06:15 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  6. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-11-04 05:26 UTCVendor advisory
  8. 2026-11-04 05:26 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  9. 2026-11-04 05:01 UTCVendor advisory
  10. 2026-11-04 05:01 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  11. 2026-11-04 04:25 UTCEchelonGraph re-scored
  12. 2026-11-04 04:25 UTCVendor advisory
  13. 2026-11-04 04:25 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-11-03 09:10 UTCEchelonGraph re-scored
  16. 2026-11-03 09:10 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-11-02 08:22 UTCEchelonGraph re-scored
  19. 2026-11-02 08:22 UTCVendor advisory
  20. 2026-11-02 08:22 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  22. 2026-11-01 07:34 UTCEchelonGraph re-scored
  23. 2026-11-01 07:34 UTCVendor advisory
  24. 2026-11-01 07:34 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  26. 2026-10-31 06:45 UTCEchelonGraph re-scored
  27. 2026-10-31 06:45 UTCVendor advisory
  28. 2026-10-31 06:45 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  29. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  30. 2026-10-30 05:56 UTCEchelonGraph re-scored
  31. 2026-10-30 05:56 UTCVendor advisory
  32. 2026-10-30 05:56 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  33. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  34. 2026-10-29 05:08 UTCEchelonGraph re-scored
  35. 2026-10-29 05:08 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  36. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  37. 2026-10-28 04:20 UTCEchelonGraph re-scored
  38. 2026-10-28 04:20 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  39. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  40. 2026-10-27 03:24 UTCEchelonGraph re-scored
  41. 2026-10-27 03:24 UTCVendor advisory
  42. 2026-10-27 03:24 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  43. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  44. 2026-10-25 22:30 UTCEchelonGraph re-scored
  45. 2026-10-25 22:30 UTCVendor advisory
  46. 2026-10-25 22:30 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  47. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  48. 2026-10-25 13:49 UTCEchelonGraph re-scored
  49. 2026-10-24 21:41 UTCEchelonGraph re-scored
  50. 2026-10-24 21:41 UTCVendor advisory
  51. 2026-10-24 21:41 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  52. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  53. 2026-10-23 20:51 UTCEchelonGraph re-scored
  54. 2026-10-23 20:51 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-10-22 20:02 UTCEchelonGraph re-scored
  57. 2026-10-22 20:02 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  58. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  59. 2026-10-21 19:12 UTCEchelonGraph re-scored
  60. 2026-10-21 19:12 UTCVendor advisory
  61. 2026-10-21 19:12 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  62. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  63. 2026-10-20 18:24 UTCEchelonGraph re-scored
  64. 2026-10-20 18:24 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  65. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  66. 2026-10-19 17:35 UTCEchelonGraph re-scored
  67. 2026-10-19 17:35 UTCVendor advisory
  68. 2026-10-19 17:35 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  69. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  70. 2026-10-19 16:28 UTCVendor advisory
  71. 2026-10-19 16:28 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  72. 2026-10-19 15:27 UTCEchelonGraph re-scored
  73. 2026-10-19 15:27 UTCVendor advisory
  74. 2026-10-19 15:27 UTCGHSA enrichmentGHSA-9mfx-g534-q3pc · GitHub severity CRITICAL · GitHub CVSS 9.1
  75. 2026-10-19 15:27 UTCMITRE cvelistV5CVSS v3 → 4.8 · severity → MEDIUM

Frequently asked(5)

What is CVE-2026-95210?
CVE-2026-95210 is a critical-severity vulnerability; its CVE record was published on October 8, 2026. GnuTLS v3.8.13 does not reject a critical keyUsage extension when it cannot be processed, such as when extnValue is an ASN.1 NULL (05 00) instead of a BIT STRING. NOTE: the Supplier does not consider this an actionable security vulnerability because of its "threat model doesn't consider attacks…
When was the CVE record for CVE-2026-95210 published?
The CVE record for CVE-2026-95210 was published on October 8, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 4, 2026; the record at its source may have been updated since.
Is CVE-2026-95210 actively exploited?
CVE-2026-95210 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-95210?
CVE-2026-95210 has a CVSS v3.1 base score of 4.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises CISA-ADP (Vulnrichment) CVSS v3.1 + FIRST EPSS + GHSA into a combined EG score of 9.1 (CRITICAL).
How do I remediate CVE-2026-95210?
A fix for CVE-2026-95210 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-95210 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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