High 7.5 CVSS 3.1 PHP Published on 2026-05-10

In PHP versions 8.2. before 8.2.31, 8.3.

CVECVE-2026-7258 GHSANo GHSA advisory

View at the source View JSON Last modified at the source: 2026-07-24

Description

In PHP versions 8.2. before 8.2.31, 8.3. before 8.3.31, 8.4. before 8.4.21, and 8.5. before 8.5.6, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.

Original text by NVD (NIST), public domain.

CVSS metrics 3.1

Source: security@php.net · secondary

High 7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vectorNetwork

ComplexityHigh

Attack requirementsPresent

Privileges requiredNone

User interactionNone

Confidentiality (system)None

Integrity (system)None

Availability (system)Low

Confidentiality (others)None

Integrity (others)None

Availability (others)Low

References

Vendor Advisorygithub.com
https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4

Found a vulnerability?

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