Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-28697

Craft Affected by Authenticated RCE via "craft.app.fs.write()" in Twig Templates
Back to all
CVE

CVE-2026-28697

Craft Affected by Authenticated RCE via "craft.app.fs.write()" in Twig Templates

Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, an authenticated administrator can achieve Remote Code Execution (RCE) by injecting a Server-Side Template Injection (SSTI) payload into Twig template fields (e.g., Email Templates). By calling the craft.app.fs.write() method, an attacker can write a malicious PHP script to a web-accessible directory and subsequently access it via the browser to execute arbitrary system commands. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.4
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28697.json, https://github.com/craftcms/cms/security/advisories/GHSA-v47q-jxvr-p68x, https://nvd.nist.gov/vuln/detail/CVE-2026-28697, https://github.com/craftcms/cms/commit/9dc2a4a3ec8e9cd5e8c0d1129f36371437519197, https://github.com/craftcms/cms/pull/18216, https://github.com/craftcms/cms/pull/18219

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.00208%
EPSS Percentile
0.43182%
Introduced Version
04755d93f86d07cc183db47db8a0eee106892e30,daac7c1da2f701f2e9ddee1da1457ce61660b581
Fix Available
0ad14c3c7e590461b52aeb44859659e2e231e04d,42cef196d68dd8d48ceaab89b2c9e2edd2cecbe8

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading