CVE-2026-33159
Craft CMS: Unauthenticated users could execute project configuration sync operations that should be restricted trusted users
Description
Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, guest users can access Config Sync updater index, obtain signed data, and execute state-changing Config Sync actions (regenerate-yaml, apply-yaml-changes) without authentication. This issue has been patched in versions 4.17.8 and 5.9.14.
INFO
Published Date :
March 24, 2026, 6:16 p.m.
Last Modified :
March 26, 2026, 5:08 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Craft CMS to version 4.17.8 or later.
- Update Craft CMS to version 5.9.14 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33159.
| URL | Resource |
|---|---|
| https://github.com/craftcms/cms/commit/7f0ead833f7c2b91ae12003caad833479dd08592 | Patch |
| https://github.com/craftcms/cms/releases/tag/4.17.8 | Release Notes |
| https://github.com/craftcms/cms/releases/tag/5.9.14 | Release Notes |
| https://github.com/craftcms/cms/security/advisories/GHSA-6mrr-q3pj-h53w | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33159 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33159
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33159 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33159 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 26, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* versions from (excluding) 4.0.0 up to (excluding) 4.17.8 *cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* versions from (excluding) 5.0.0 up to (excluding) 5.9.14 Added Reference Type GitHub, Inc.: https://github.com/craftcms/cms/commit/7f0ead833f7c2b91ae12003caad833479dd08592 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/craftcms/cms/releases/tag/4.17.8 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/craftcms/cms/releases/tag/5.9.14 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/craftcms/cms/security/advisories/GHSA-6mrr-q3pj-h53w Types: Vendor Advisory -
New CVE Received by [email protected]
Mar. 24, 2026
Action Type Old Value New Value Added Description Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, guest users can access Config Sync updater index, obtain signed data, and execute state-changing Config Sync actions (regenerate-yaml, apply-yaml-changes) without authentication. This issue has been patched in versions 4.17.8 and 5.9.14. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/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 Added CWE CWE-306 Added CWE CWE-862 Added Reference https://github.com/craftcms/cms/commit/7f0ead833f7c2b91ae12003caad833479dd08592 Added Reference https://github.com/craftcms/cms/releases/tag/4.17.8 Added Reference https://github.com/craftcms/cms/releases/tag/5.9.14 Added Reference https://github.com/craftcms/cms/security/advisories/GHSA-6mrr-q3pj-h53w