CVE-2026-104445

YesWiki before 4.6.7 contains an authentication bypass vulnerability in the ActivityPub inbox that fails to bind the verified HTTP signature signer to the activity actor. Unauthenticated attackers with any ActivityPub keypair can send signed Delete or Update activities referencing a mirrored entry's sourceUrl to delete or overwrite other actors' federated entries.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-rm6r-grfg-4v78
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-authentication-bypass-via-activitypub-inbox-actor-spoofing

Configurations

No configuration.

History

02 Oct 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-02 12:17

Updated : 2026-10-06 17:17

NVD link : CVE-2026-104445

Mitre link : CVE-2026-104445

CVE.ORG link : CVE-2026-104445

JSON object : View

Products Affected

No product.

CWE

CWE-290

Authentication Bypass by Spoofing

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