# CVE-2026-85598

## Summary

- **CVE ID:** CVE-2026-85598
- **Severity:** MEDIUM
- **CVSS Score:** 6.4 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N)
- **CWE:** CWE-79
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 14, 2026

## Description

Grav versions 2.0.0 through 2.0.17 fail to apply save-time XSS detection to modular pages, allowing authenticated page editors to store Twig-assembled XSS payloads. Attackers with page-edit rights can create modular pages with malicious Twig code that executes in visitor browsers when the parent page is rendered, including in administrator sessions.

## Affected Products

- getgrav — grav (2.0.0)

## References

- [CNA](https://github.com/getgrav/grav/security/advisories/GHSA-fg8g-663r-f366)
- [CNA](https://www.vulncheck.com/advisories/grav-2.0.0-through-2.0.17-stored-xss-via-modular-pages)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.15%
- **EPSS Percentile:** 4.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._