CVE-2026-8857noneobserved exploitationCWE-94

CVE-2026-8857: vulnerability in Wikimedia Foundation timeline

Full RCE using EasyTimeline Extension

Published

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40Vexday Risk Score

Patch now. It exploitation observed by VulnCheck and has a working public exploit.

ssvc Actcvss 0epss 2.1%
from disclosure to weapon
Published on NVDJul 1
VulnCheck+127d
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
Wikimedia Foundation · timeline
Related CVEs — Wikimedia Foundation timeline

In the same product, most dangerous first.

CVE-2026-58038NONEStored XSS through javascript URLs in SVGs generated by EasyTimelineEPSS 0.3%