CVE-2026-116205

YesWiki before 4.7.0 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to fetch arbitrary URLs by supplying [[|URL]] wiki syntax to the render handler. Attackers can pass the syntax in the content parameter of the page render handler to reach internal hosts and ports and read their responses.

Score

CVSS 4.0 6.9 Medium

Status

Deferred - disclosure@vulncheck.com

Published

2026-10-25

Last modified

2026-10-25

Weaknesses

CWE-918

Affected products

• Yeswiki (Yeswiki)

References

• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-x9j5-r988-9jcc
• https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-unauthenticated-ssrf-via-url-raw-inclusion-syntax