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Advisory record · GHSA-94rc-cqvm-m4pw

Craft CMS Vulnerable to Authenticated RCE via Twig SSTI - create() function + Symfony Process gadget

CVSS 7.5 HighEPSS 0.0066 · 52nd percentile

Published by the GitHub Advisory Database at 3 Mar 2026, 20:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
craftcms/cmsPackagist>=5.8.7, <5.9.0-beta.1 || >=4.0.0-RC1, <4.17.0-beta.15.9.0-beta.1, 4.17.0-beta.1
Identifiers
GHSA-94rc-cqvm-m4pw · CVE-2026-28695 · PKSA-n7dz-mnbq-y23y
Weakness (CWE)
CWE-22 · CWE-94 · CWE-1336
Tags
Published
3 Mar 2026
Updated
4 Mar 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Craft CMS (craftcms/cms) versions from 4.0.0-RC1 before 4.17.0-beta.1, and from 5.8.7 before 5.9.0-beta.1, are vulnerable. An authenticated administrator, or a user with access to the System Messages utility, can use a Twig server-side template injection through the create() function, combined with the bundled Symfony Process component, to run arbitrary shell commands on the server. Upgrade to 4.17.0-beta.1 or 5.9.0-beta.1, or later.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0066, the 52nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:26 UTC First seen by agentprime
  2. 31 Oct 2026, 14:26 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.