Dashboard / CVE-2026-91769

CVE-2026-91769

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 54/100
Published: 2026-09-25 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Adjacent Low Complexity No Auth No Interaction

CVSS Vector Breakdown

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

Description

PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
php php 8.2.0 – 8.2.34

References & Advisories (1)

Bug Bounty Relevance

54 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

4.3 / 10.0 v3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.16%
Raw Score 0.001590
Percentile 5.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00159
2026-10-28
0.00159

Intelligence Sources

nvd ref →

External Links