YesWiki up to 4.6.2 HttpSignatureService verifySignature authentication replay

Summaryinfo

A vulnerability, which was classified as critical, was found in YesWiki up to 4.6.2. The impacted element is the function HttpSignatureService::verifySignature of the component HttpSignatureService. Such manipulation leads to authentication replay. This vulnerability is documented as CVE-2026-116825. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in YesWiki up to 4.6.2. Affected by this issue is the function HttpSignatureService::verifySignature of the component HttpSignatureService. The manipulation with an unknown input leads to a authentication replay vulnerability. Using CWE to declare the problem leads to CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). Impacted is confidentiality, integrity, and availability. CVE summarizes:

YesWiki from 4.6.2 before 4.7.0 lacks replay protection in HttpSignatureService::verifySignature(), which never validates the Date header or tracks seen signatures. Attackers who capture a signed request to the /api/forms/{formId}/actor/inbox endpoint can replay it later to re-execute Delete, Update, Follow, or Undo actions.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-116825 since 10/26/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1040.

Upgrading to version 4.7.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-110532). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Content Management System

Name

• YesWiki

Version

• 4.6.0
• 4.6.1
• 4.6.2

Website

• Product: https://github.com/YesWiki/yeswiki/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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