CVE-2026-31859
1 advisory.
Packagist/craftcms/cms CVE-2026-31859: medium, EPSS 0.26%
CraftCMS vulnerable to reflective XSS via incomplete return URL sanitization
Action: Upgrade craftcms/cms to 4.17.3 or later.
composer require craftcms/cms:4.17.3composer require craftcms/cms:5.9.7Affected
| introduced | fixed | last affected |
|---|---|---|
| 4.15.3 | 4.17.3 | - |
| 5.7.5 | 5.9.7 | - |
Fixed versions
| 4.17.3 | 5.9.7 |
Sources
- osv: GHSA-fvwq-45qv-xvhv
- https://github.com/craftcms/cms/security/advisories/GHSA-fvwq-45qv-xvhv
- https://nvd.nist.gov/vuln/detail/CVE-2026-31859
- https://github.com/craftcms/cms/commit/cc9921c14897ee2b592a431c2356af8a04ce4cfe
- https://github.com/craftcms/cms
CVE-2026-31859 · published · modified · JSON