---
title: "CVE-2026-115935: Craft CMS - CRLF Injection & Remote Code Execution"
description: "Craft CMS allows authenticated non-admin users with accessCp to inject newline characters in X-Craft-Plugin-Licenses header, causing CRLF injection in .env writer, letting attackers forge signed login redirects with Twig system() calls."
url: https://panop.io/threat-heartbeat/CVE-2026-115935/
---

# CVE-2026-115935 Craft CMS - CRLF Injection & Remote Code Execution

Craft CMS allows authenticated non-admin users with accessCp to inject newline characters in X-Craft-Plugin-Licenses header, causing CRLF injection in .env writer, letting attackers forge signed login redirects with Twig system() calls.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.68% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-115935)

## Details

Type

CRLF Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

23 October 2026

Updated

25 October 2026

Weakness

[CWE-94](https://cwe.mitre.org/data/definitions/94.html)

## Vendor fix

Update to the latest Craft CMS version with fixes for CRLF injection in API response headers.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-115935](https://nvd.nist.gov/vuln/detail/CVE-2026-115935)
- [https://github.com/craftcms/cms/releases/tag/5.11.2](https://github.com/craftcms/cms/releases/tag/5.11.2)
- [https://github.com/craftcms/cms/security/advisories/GHSA-9hp6-3565-gvh5](https://github.com/craftcms/cms/security/advisories/GHSA-9hp6-3565-gvh5)
- [https://www.hckrt.com/hacktivity/HCKRT-WM3VSE](https://www.hckrt.com/hacktivity/HCKRT-WM3VSE)
- [https://github.com/craftcms/cms](https://github.com/craftcms/cms)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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