Blind Server-Side Request Forgery in YesWiki by YesWiki
CVE-2026-104440

6.9MEDIUM

Key Information:

Vendor

Yeswiki

Status
Yeswiki
Vendor
CVE Published:
2 October 2026

What is CVE-2026-104440?

A vulnerability exists in YesWiki prior to version 4.6.7 that allows unauthenticated attackers to exploit a blind server-side request forgery (SSRF) via the 'idtypeannonce' parameter of the /api/entries/bazarlist endpoint. Due to the flawed implementation of the isValidURL() function, which always returns true, attackers can craft requests to probe internal networks and obtain sensitive internal services or metadata endpoints using curl in the loadURLContent() function.

Affected Version(s)

yeswiki 0 < 4.6.7

yeswiki 4.6.7

References

https://github.com/YesWiki/yeswiki/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

skeletonsec
.