CVE-2026-104443: YesWiki before 4.6.7 Scope Bypass via Triples Delete API

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-02
Weakness: CWE-863

Description

YesWiki before 4.6.7 contains an empty-filter scope bypass in the triples delete API that allows any authenticated user to delete or forge arbitrary semantic triples regardless of ownership. Attackers can send an empty filter to the triples delete endpoint to remove the admins-group membership triple, emptying the admin group and causing a site-wide authorization lockout.

Affected products

yeswiki: before 4.6.7 — fixed in 4.6.7

How to fix

Upgrade to a fixed version: yeswiki 4.6.7. Check the vendor advisory for mitigations.

References

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-9j7h-ccj2-jxv6
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-scope-bypass-via-triples-delete-api
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-9j7h-ccj2-jxv6

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