CVE-2026-52771

YesWiki is a wiki system written in PHP. From version 4.2.0 to before version 4.6.6, ApiController::deletePage() interpolates a page tag retrieved from the database into a DELETE FROM …_links WHERE to_tag = '$tag' query without escaping. The page tag is attacker-controlled — the POST /api/pages/{tag} API accepts arbitrary URL-encoded values, including single quotes, and stores them. A low-privilege authenticated user can therefore create a page whose tag is a SQL fragment, make the page non-orphaned via the standard {{include page="…"}} link mechanism, and then invoke the delete endpoint to execute arbitrary SQL inside the wiki database - including time-based blind data exfiltration from any table. This issue has been patched in version 4.6.6.

• CWE-89

• https://github.com/YesWiki/yeswiki/commit/23d3cc124613b9428ab963b31807c08879a9c631
• https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6
• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-8f2v-2qhj-gfwg

Published

Sep 5, 2026

Last Modified

Sep 8, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-52763YesWiki is a wiki system written in PHP. Prior to version 4.…6.5
• CVE-2026-52766YesWiki is a wiki system written in PHP. Prior to version 4.…9.1
• CVE-2026-52767YesWiki is a wiki system written in PHP. From version 4.6.2 …8.2
• CVE-2026-52769YesWiki is a wiki system written in PHP. From version 4.6.2 …8.3
• CVE-2026-5277Integer overflow in ANGLE in Google Chrome on Windows prior …7.5
• CVE-2026-52770YesWiki is a wiki system written in PHP. Prior to version 4.…7.5
• CVE-2026-52772YesWiki is a wiki system written in PHP. Prior to version 4.…5.5
• CVE-2026-52773YesWiki is a wiki system written in PHP. From version 4.1.0 …6.1
• CVE-2026-52774YesWiki is a wiki system written in PHP. Prior to version 4.…6.1
• CVE-2026-52775YesWiki is a wiki system written in PHP. Prior to version 4.…8.8
• CVE-2026-52776Compliance-trestle (Trestle) is a tooling platform for manag…8.6
• CVE-2026-52777YesWiki is a wiki system written in PHP. Prior to version 4.…9.4