CVE-2026-8857 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-8857NONE

Wikimedia Foundation timeline — Full RCE using EasyTimeline Extension

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   N   N   N   N    0.0   .0147   71.7     —

AFFECTED
  Product   Versions     Fixed
  timeline  unspecified  —

TIMELINE
  May 18  Reserved by wikimedia-foundation
  Jul 1   EXPLOIT PUBLISHED — CVE-2026-8857 (Wikimedia Foundation timeline). Public exploit reference added.
  Jul 1   Published (CNA: wikimedia-foundation)

CWE-94 · CNA: wikimedia-foundation · CVSS v4.0 · 1 reference · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 18, 2026	Reserved	Reserved by wikimedia-foundation
July 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-8857 (Wikimedia Foundation timeline). Public exploit reference added.
July 1, 2026	Published	Published (CNA: wikimedia-foundation)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Wikimedia Foundation	timeline	—	—	—

Weaknesses

CWE-94

References (1)

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

Authoritative record: CVE-2026-8857 at cve.org

Vendors: wikimedia foundation

Weaknesses: CWE-94

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-8857 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.