CVE-2026-116205: YesWiki before 4.7.0 Unauthenticated SSRF via [[|URL]] Raw-Inclusion Syntax
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.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
Any remote, unauthenticated attacker who can send a request to the YesWiki page render handler can exploit it. No credentials or user interaction are required.
What access can an attacker obtain through the vulnerability?
An attacker can cause the YesWiki server to fetch arbitrary URLs, including URLs on internal hosts and ports reachable from that server. They can read the responses returned by those requests.
Which deployments are affected?
YesWiki versions before 4.7.0 are affected. The issue is exposed through the page render handler when attacker-controlled content is processed using the [[|URL]] raw-inclusion syntax.