CVE-2026-79987 json
Low-privilege RCE through element-search eager loading
published 2mo ago modified 2mo ago also EUVD-2026-75586 , GHSA-9c4j-cjw3-r3xx
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository craftcms/cms. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
A remote, authenticated, non-admin Craft CMS Control Panel user with only the accessCp permission can execute operating system commands as the PHP web worker.
Patch / fix
Is CVE-2026-79987 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2mo ago
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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 |
Affected products
- craftcms cms
Classification
- Weakness
-
- CWE-470 Use of Externally-Controlled Input to Select Classes or Code
References
-
hckrt.com
/hacktivity/HCKRT-9TSYY2
third-party-advisory, technical-description, mitigation
-
github.com
/craftcms/cms/releases/tag/5.10.13
release-notes
-
github.com
/craftcms/cms
product
-
github.com
/craftcms/cms/security/advisories/GHSA-9c4j-cjw3-r3xx
third-party-advisory, advisory
Sources
- CVE List CVE-2026-79987
- NVD CVE-2026-79987
- Maintainer advisory GHSA-9c4j-cjw3-r3xx
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of craftcms/cms published their own advisory on GitHub. Reviewed sources take precedence over it.