What’s Vulnerable › Vulnerabilities

CVE-2026-103441: Unauthenticated arbitrary file deletion through Wikibase serialized entity parsing

• Severity: high (CVSS 7.2 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-09-30
• Weakness: CWE-502

Description

Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files. This issue affects MediaWiki Wikibase extension: 1.46, 1.45, and 1.43.

Affected products

• The Wikimedia Foundation MediaWiki Wikibase extension: 1.46, 1.45, 1.43

References

• https://gerrit.wikimedia.org/r/q/Id35bf747e48370e474d9b9444bd7520b24836e8d
• https://phabricator.wikimedia.org/T435210

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