CVE-2026-67693

LOW
INFO Priority: 0.01 BB Relevance: 57/100
Published: 2026-10-08 Modified: 2026-11-04 First seen: 2026-11-04 Status: active

Attack Surface

Network No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Unchanged
C: Low
I: None
A: None

Description

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.

Weakness Classification (1)

Affected Software (3)

VendorProductVersion
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a

Bug Bounty Relevance

57 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

3.7 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.17%
Raw Score 0.001670
Percentile 6.0%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00167
2026-11-13
0.00167
2026-11-12
0.00167
2026-11-10
0.00167
2026-11-09
0.00167
2026-11-08
0.00167
2026-11-07
0.00167
2026-11-06
0.00167
2026-11-05
0.00167
2026-11-04
0.00167
2026-11-03
0.00151

Intelligence Sources

mitre ref →
nvd ref →