Medium 6.5Published Mar 4, 2026

CVE-2026-28781Craft is a content management system (CMS).

Updated under an hour ago (2026-10-19 09:00 UTC)

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It affects craftcms craft_cms. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for craftcms craft_cms

Exploited in the last 30 days

Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, the entry creation process allows for Mass Assignment of the authorId attribute. A user with "Create Entries" permission can inject the authorIds[] (or authorId) parameter into the POST request, which the backend processes without verifying if the current user is authorized to assign authorship to others. Normally, this field is not present in the request for users without the necessary permissions. By manually adding this parameter, an attacker can attribute the new entry to any user, including Admins. This effectively "spoofs" the authorship. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-639, CWE-915
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

craftcms craft_cms craftcms:craft_cms	after 4.0.0 before 4.17.0; after 5.0.0 before 5.9.0; 4.0.0; 4.0.0; 4.0.0; 4.0.0; 5.0.0; 5.0.0	NVD

References

https://github.com/craftcms/cms/commit/830b403870cd784b47ae42a3f5a16e7ac2d7f5a8patch
https://github.com/craftcms/cms/commit/c6dcbdffaf6ab3ffe77d317336684d83699f4542patch
https://github.com/craftcms/cms/security/advisories/GHSA-2xfc-g69j-x2mpexploit, patch, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.