CVE-2026-67693

HIGHPre-NVD 3.77.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-10-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 3.7; sources differ by 3.8.

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

Also known asEUVD-2026-95206 (ENISA EUVD) · GHSA-j75v-5pm7-3cg8 (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
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: 3.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

GnuTLS v3.8.13 does not reject end-entity X.509 certificates that contain a contradictory combination of Key Usage (KU) and Extended Key Usage (EKU). 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
3.7
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

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.
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
6th
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
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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 (2)

Auto-updated Oct 9, 2026
Patch available.
Web page

gist:6fbfc191bc6163942c8017551ac3f238 · GitHub

https://gist.github.com/lkloliver/6fbfc191bc6163942c8017551ac3f238
Web page

lib/x509/verify.c · 3.8.13 · gnutls / GnuTLS · GitLab

https://gitlab.com/gnutls/gnutls/-/blob/3.8.13/lib/x509/verify.c#L1119-1178

Vendor Advisories for CVE-2026-67693(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 8× in last 7d / 50× 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.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-11-11 11:09 UTCEchelonGraph re-scored
  4. 2026-11-11 11:09 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-11-04 05:27 UTCVendor advisory
  13. 2026-11-04 05:27 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-11-04 05:01 UTCVendor advisory
  15. 2026-11-04 05:01 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-11-04 04:26 UTCVendor advisory
  17. 2026-11-04 04:26 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  18. 2026-11-04 03:41 UTCVendor advisory
  19. 2026-11-04 03:41 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-11-04 00:31 UTCEchelonGraph re-scored
  21. 2026-11-04 00:31 UTCVendor advisory
  22. 2026-11-04 00:31 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 4th percentile
Show 61 more
  1. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-10-27 18:49 UTCEchelonGraph re-scored
  6. 2026-10-27 18:49 UTCVendor advisory
  7. 2026-10-27 18:49 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  8. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-10-25 14:10 UTCEchelonGraph re-scored
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  15. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  16. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
  17. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  18. 2026-10-19 15:26 UTCVendor advisory
  19. 2026-10-19 15:26 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-10-19 15:09 UTCEchelonGraph re-scored
  21. 2026-10-19 15:09 UTCVendor advisory
  22. 2026-10-19 15:09 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-10-19 15:07 UTCMITRE cvelistV5CVSS v3 → 3.7 · severity → LOW
  24. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  25. 2026-10-18 03:20 UTCEchelonGraph re-scored
  26. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  27. 2026-10-16 18:32 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  28. 2026-10-16 17:52 UTCEchelonGraph re-scored
  29. 2026-10-16 17:52 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  30. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  31. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  32. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  33. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  34. 2026-10-13 10:19 UTCEchelonGraph re-scored
  35. 2026-10-13 10:19 UTCVendor advisory
  36. 2026-10-13 10:19 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  37. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  38. 2026-10-12 15:45 UTCEchelonGraph re-scored
  39. 2026-10-12 00:34 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  40. 2026-10-11 19:30 UTCEchelonGraph re-scored
  41. 2026-10-11 16:45 UTCEchelonGraph re-scored
  42. 2026-10-11 14:06 UTCEchelonGraph re-scored
  43. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  44. 2026-10-11 12:32 UTCEchelonGraph re-scored
  45. 2026-10-11 12:32 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  46. 2026-10-11 00:32 UTCEchelonGraph re-scored
  47. 2026-10-11 00:31 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  48. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  49. 2026-10-10 12:30 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-10-10 00:33 UTCEchelonGraph re-scored
  51. 2026-10-10 00:33 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  53. 2026-10-09 12:35 UTCEchelonGraph re-scored
  54. 2026-10-09 12:34 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8 · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-10-09 11:34 UTCEchelonGraph re-scoredFirst assessed: 7.5 HIGH
  56. 2026-10-09 11:34 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8
  57. 2026-10-09 11:33 UTCMITRE cvelistV5CVSS → 7.5 · severity → HIGH
  58. 2026-10-08 21:38 UTCGHSA enrichmentGHSA-j75v-5pm7-3cg8
  59. 2026-10-08 19:37 UTCNVD update
  60. 2026-10-08 18:55 UTCEchelonGraph re-scored
  61. 2026-10-08 18:54 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-67693?
CVE-2026-67693 is a high-severity vulnerability; its CVE record was published on October 8, 2026. GnuTLS v3.8.13 does not reject end-entity X.509 certificates that contain a contradictory combination of Key Usage (KU) and Extended Key Usage (EKU). NOTE: the Supplier does not consider this an actionable security vulnerability because of its "threat model doesn't consider attacks only possible by…
When was the CVE record for CVE-2026-67693 published?
The CVE record for CVE-2026-67693 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-2026-67693 actively exploited?
CVE-2026-67693 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67693?
CVE-2026-67693 has a CVSS v3.1 base score of 3.7 (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 7.5 (HIGH).
How do I remediate CVE-2026-67693?
A fix for CVE-2026-67693 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67693 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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