Medium severity · published Oct 26, 2026
CVE-2026-116825
YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox
New
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
YE
yeswiki · YesWiki
4.6.2 before 4.7.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116825
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116825
github.com
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7m9j-h553-397x
www.vulncheck.com
https://www.vulncheck.com/advisories/yeswiki-from-4.6.2-before-4.7.0-http-signature-replay-via-activitypub-inbox
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