🛡️ CVE-2026-8857 — mediawiki

🟠 CVSS 8.8 — High ⚠️ Exploit Public CWE-94 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A vulnerability in Wikimedia Foundation timeline.

This vulnerability is associated with program files scripts/EasyTimeline.Pl, includes/Timeline.Php.

This issue affects timeline: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-8857 is classified as CWE-94: Code Injection. Input is incorporated into code that the runtime evaluates, so an attacker can have their own code executed.

Affected software

CVE-2026-8857 is recorded against 1 package.

  • mediawiki (from 1.45.0 up to 1.45.4)

Timeline and source

Published on 1 July 2026 and last revised on 9 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

phabricator.wikimedia.org

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-94
Public Exploit ⚠️ Yes
Source NVD
Published 2026-07-01
Updated 2026-08-11
Modified 2026-07-09
Fix URL N/A

Affected Packages

Software From version Fixed in
mediawiki 1.45.0 1.45.4

References

Exploit, Third Party Advisory https://phabricator.wikimedia.org/T426631

Similar Threats

Exploit Protection

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