Server-Side Request Forgery in YesWiki Affects Administrators
CVE-2026-116826

8.2HIGH

Key Information:

Vendor

Yeswiki

Status
Yeswiki
Vendor
CVE Published:
26 October 2026

What is CVE-2026-116826?

A vulnerability inherent in YesWiki before version 4.7.0 allows authenticated administrators to exploit the DuplicationManager::downloadFile() function. By sending crafted POST requests to /api/pages/{tag}/duplicate, attackers can perform arbitrary outbound requests, potentially compromising sensitive data such as local files, cloud metadata, or database credentials. The resulting exposure in the publicly accessible files/ directory constitutes a significant security risk for systems utilizing this application.

Affected Version(s)

yeswiki 0 < 4.7.0

yeswiki 4.7.0

References

https://github.com/YesWiki/yeswiki/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/yeswiki-before-4.7.0...
third-party-advisory

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

manus-pi
manus-use
.