CVE-2026-91768

Published: Set 26, 2026 Last Modified: Set 26, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,5
Source: [email protected]
Attack Vector: adjacent_network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none

Description

AI Translation Available

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.

1023

Incomplete Comparison with Missing Factors

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Access Control
Potential Impacts:
Alter Execution Logic Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
View CWE Details
https://github.com/php/php-src/security/advisories/GHSA-62x…
https://github.com/php/php-src/security/advisories/GHSA-62xp-839h-2637