CVE-2026-28697

Name: CVE-2026-28697
Creator: NVD / NIST
Published: 2026-03-04T17:16:21.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.4/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2026-28697 is a critical-severity vulnerability rated 9.4/10 on the CVSS scale. 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). EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.1/10

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

CVSS 4.0

9.4/10

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

EPSS Probability

1.07%

60.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1336

Affected Software

Vendor	Product	Versions
Craftcms	Craft Cms	> 4.0.0, < 4.17.0
Craftcms	Craft Cms	> 5.0.0, < 5.9.0
Craftcms	Craft Cms	4.0.0
Craftcms	Craft Cms	5.0.0

References

https://github.com/craftcms/cms/commit/9dc2a4a3ec8e9cd5e8c0d1129f36371437519197Patch
https://github.com/craftcms/cms/pull/18216Issue Tracking, Patch
https://github.com/craftcms/cms/pull/18219Issue Tracking, Patch
https://github.com/craftcms/cms/security/advisories/GHSA-v47q-jxvr-p68xExploit, Mitigation, Patch, Vendor Advisory

Timeline

Published: Mar 4, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-28697?

How severe is CVE-2026-28697?

CVE-2026-28697 has a CVSS score of 9.4/10 (CRITICAL severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2026-28697?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-28697?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST