CVE-2026-50279: Craft CMS is a content management system (CMS). IN versions 5.0.0-RC1 and above prior to 5.9.21, theEntriesController::actionSaveEntry() performs entry-edit permission checks befor

unknownCVE-2026-50279

Craft CMS is a content management system (CMS). IN versions 5.0.0-RC1 and above prior to 5.9.21, theEntriesController::actionSaveEntry() performs entry-edit permission checks before request-controlled author changes are applied to the model, allowing for authorship spoofing. The subsequent author mutation path accepts attacker-supplied authors / author parameters and allows the change when the current user is one of the old authors. Because the controller does not re-run authorization after mutating the author list, a low-privileged user can reassign an entry’s authorship to another user without holding the dedicated peer-author-change permission. This issue has been fixed in version 5.9.21.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: unknown
Published: 2026-07-02
Last updated: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-50279

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-502790.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50279	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highGHSA-qq2c-2q8j-jh27: Craft CMS: Authorship spoofing in `entries/save-entry` via pre-check/post-mutation author…ghsa

Recent advisories for Craft CMS is

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highGHSA-86vw-x4ww-x467: Craft CMS: RCE via missing cleanseConfig in FieldsController::actionRenderCardPreviewghsa · 2026-07-09
lowGHSA-c43v-4cr8-6mvp: Craft CMS has authenticated path traversal in `assets/icon`, allowing local `.svg` file r…ghsa · 2026-07-09
highGHSA-f74w-488g-8x5r: Craft CMS: Potential authenticated Remote Code Execution via referrer redirectghsa · 2026-07-06
mediumGHSA-xrqc-p465-2xvg: Craft CMS: Stored XSS via Structure entry title in table viewghsa · 2026-07-06
mediumGHSA-287w-mxq6-x2cp: Craft CMS: Sensitive File Disclosure / Server-Side File Readghsa · 2026-07-06
highGHSA-24x4-j6x9-rfw5: Craft CMS: DOM XSS via GitHub issue title in CraftSupport widgetghsa · 2026-07-06