Dashboard / CVE-2026-91768

CVE-2026-91768

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 58/100
Published: 2026-09-25 Modified: 2026-10-27 First seen: 2026-10-29 Status: active

Attack Surface

Adjacent Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

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

Description

The IPv6 branch of the FastCGI client access check compares only the first 12 bytes of a 16-byte IPv6 address, so listen.allowed_clients matches on a /96 prefix instead of the exact address. An attacker who can source an address sharing the first 96 bits with an allowed one passes the check and reaches the FastCGI endpoint.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
php php 8.2.0 – 8.2.34

References & Advisories (1)

Bug Bounty Relevance

58 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.5 / 10.0 v3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.38%
Raw Score 0.003760
Percentile 31.6%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00376
2026-10-28
0.00376

Intelligence Sources

nvd ref →

External Links