# CVE-2026-52777

## Summary

- **CVE ID:** CVE-2026-52777
- **Severity:** CRITICAL
- **CVSS Score:** 9.4 (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)
- **CWE:** CWE-352, CWE-502
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 8, 2026

## 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 Products

- YesWiki — yeswiki (< 4.6.6)

## References

- [CNA](https://github.com/YesWiki/yeswiki/security/advisories/GHSA-9369-69wj-7m2f)
- [CNA](https://github.com/YesWiki/yeswiki/commit/8f70a8d6b8befa0e644d03c785701dbbc55b8fd0)
- [CNA](https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.21%
- **EPSS Percentile:** 11.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._