CVE-2026-31859
medium
CVSS v3
—
CVSS v4 NEW
—
VIR risk
5.5
Description
CraftCMS vulnerable to reflective XSS via incomplete return URL sanitization
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | craftcms/cms | >=4.15.3,<4.17.3 | 4.17.3 |
| Packagist | craftcms/cms | >=5.7.5,<5.9.7 | 5.9.7 |
| COMPOSER | craftcms/cms | >= 5.7.5, <= 5.9.6 | 5.9.7 |
| COMPOSER | craftcms/cms | >= 4.15.3, <= 4.17.2 | 4.17.3 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.