🛡️ CVE-2026-6735 on Debian — php7.4

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, 8.5.* before 8.5.6, due to improper sanitation of user data, it allows an attacker to compose an URL, which will cause the target to execute arbitrary JavaScript code (XSS) on the target's machine when the target is viewing the PHP-FPM status page.

Distribution advisory

This page covers CVE-2026-6735 as tracked by Debian, for the package php7.4. The fix is available in version 7.4.33-1+deb11u11; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

Affected software

DEBIAN-CVE-2026-6735 is recorded against 3 packages.

  • php7.4 (fixed in 7.4.33-1+deb11u11)
  • php8.2 (fixed in 8.2.31-1~deb12u1)
  • php8.4 (fixed in 8.4.21-1)

Timeline and source

Published on 10 May 2026 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2026-6735 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-05-10
Updated 2026-08-12
Modified 2026-08-04
Fix URL N/A

Affected Packages

Software From version Fixed in
php7.4 — 7.4.33-1+deb11u11
php8.2 — 8.2.31-1~deb12u1
php8.4 — 8.4.21-1

Site Security Check

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DEBIAN-CVE-2026-6735 is rated CVSS 8.0 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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