Second-Order SQL Injection in YesWiki AclService by YesWiki
CVE-2026-104456

7.2HIGH

Key Information:

Vendor

Yeswiki

Status
Yeswiki
Vendor
CVE Published:
2 October 2026

What is CVE-2026-104456?

YesWiki versions before 4.6.7 are susceptible to a second-order SQL injection vulnerability in the AclService::updateRequestWithACL method. This flaw allows attackers to exploit a stored username that is improperly concatenated into a read-ACL LIKE clause without appropriate escaping. By self-registering an account with a specially crafted name that includes a double-quote payload, an attacker can manipulate the application's ACL-filtered listings. This can lead to unauthorized access to sensitive database contents, effectively bypassing designated read ACLs and compromising the integrity of the web application.

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:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

manus-use
.