Vulnerability · Published Sep 4, 2026 · Assigned by GitHub_M
CVE-2026-52777YesWiki: Authenticated PHP Object Injection in BazarImportAction via unserialize
Critical 9.4
In plain English
A critical-severity cross-site request forgery in yeswiki from YesWiki. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)9.4Critical
Exploit odds (30 days)0.3%top 79.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, there is an authenticated PHP object injection vulnerability in BazarImportAction via unserialize. This issue has been patched in version 4.6.6.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | yeswiki/yeswiki | 4.6.6 | GHSA-9369-69wj-7m2f |
Affected products (as reported)
Weakness: CWE-352, CWE-502 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
References
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-9369-69wj-7m2f x_refsource_CONFIRM
- https://github.com/YesWiki/yeswiki/commit/8f70a8d6b8befa0e644d03c785701dbbc55b8fd0 x_refsource_MISC
- https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6 x_refsource_MISC