What’s Vulnerable › Vulnerabilities

CVE-2026-116205: YesWiki before 4.7.0 Unauthenticated SSRF via [[|URL]] Raw-Inclusion Syntax

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-25 · updated 2026-10-29
• Weakness: CWE-918

Description

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 products

• yeswiki: before 4.7.0 — fixed in 4.7.0

How to fix

Upgrade to a fixed version: yeswiki 4.7.0. Check the vendor advisory for mitigations.

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
• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-x9j5-r988-9jcc

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