# CVE-2026-52762

## Summary

- **CVE ID:** CVE-2026-52762
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-1336
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 8, 2026

## Description

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki Bazar contains a stored Server-Side Template Injection (SSTI) vulnerability in the semantic template feature that can be escalated to confirmed Remote Code Execution (RCE). An authenticated administrator can place arbitrary Twig expressions into the Semantic template (Twig) field (bn_sem_template), and that content is later executed server-side when public semantic endpoints are requested. 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-65p8-9433-jpcp)
- [CNA](https://github.com/YesWiki/yeswiki/commit/89462f1577a8a1fe7fcff75e77b5058a74d8047b)
- [CNA](https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 37.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._