CVE-2026-27128
CVE-2026-27128 · Craft CMS's race condition in Token Service potentially allows for token usage greater than the token limit
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a Time-of-Check-Time-of-Use (TOCTOU) race condition exists in Craft CMS’s token validation service for tokens that explicitly set a limited usage. The `getTokenRoute()` method reads a token’s usage count, checks if it’s within limits, then updates the database in separate non-atomic operations. By sending concurrent requests, an attacker can use a single-use impersonation token multiple times before the database update completes. To make this work, an attacker needs to obtain a valid user account impersonation URL with a non-expired token via some other means and exploit a race condition while bypassing any rate-limiting rules in place. For this to be a privilege escalation, the impersonation URL must include a token for a user account with more permissions than the current user. Versions 4.16.19 and 5.8.23 patch the issue.
CVSS 6.9 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: php
Affected products and versions
cms
- Versions
- >= 4.5.0-RC1, < 4.16.19: Affected
- >= 5.0.0-RC1, < 5.8.23: Affected
No fix published
craftcms/cms Packagist
- Versions
- 4.10.0
- 4.10.0-beta.1
- 4.10.0-beta.2
- 4.10.1
- 4.10.2
- 4.10.3
- 4.10.4
- 4.10.5
- 4.10.6
- 4.10.7
- 4.10.8
- 4.11.0
- 4.11.0.1
- 4.11.0.2
- 4.11.1
- 4.11.2
- 4.11.3
- 4.11.4
- 4.11.5
- 4.12.0
- 4.12.1
- 4.12.2
- 4.12.3
- 4.12.4
- 4.12.4.1
- 4.12.5
- 4.12.6
- 4.12.6.1
- 4.12.7
- 4.12.8
- 4.12.9
- 4.13.0
- 4.13.1
- 4.13.1.1
- 4.13.10
- 4.13.2
- 4.13.3
- 4.13.4
- 4.13.5
- 4.13.6
- 4.13.7
- 4.13.8
- 4.13.9
- 4.14.0
- 4.14.0.1
- 4.14.0.2
- 4.14.1
- 4.14.10
- 4.14.11
- 4.14.11.1
- 4.14.12
- 4.14.13
- 4.14.14
- 4.14.15
- 4.14.2
- 4.14.3
- 4.14.4
- 4.14.5
- 4.14.6
- 4.14.7
- 4.14.8
- 4.14.8.1
- 4.14.9
- 4.15.0
- 4.15.0-beta.1
- 4.15.0-beta.2
- 4.15.0.1
- 4.15.0.2
- 4.15.1
- 4.15.2
- 4.15.3
- 4.15.4
- 4.15.5
- 4.15.6
- 4.15.6.1
- 4.15.6.2
- 4.15.7
- 4.16.0
- 4.16.1
- 4.16.10
- 4.16.11
- 4.16.12
- 4.16.13
- 4.16.14
- 4.16.15
- 4.16.16
- 4.16.17
- 4.16.18
- 4.16.2
- 4.16.3
- 4.16.4
- 4.16.5
- 4.16.6
- 4.16.6.1
- 4.16.7
- 4.16.8
- 4.16.9
- 4.16.9.1
- 4.5.0
- 4.5.1
- 4.5.10
- 4.5.11
- 4.5.11.1
- 4.5.12
- 4.5.13
- 4.5.14
- 4.5.15
- 4.5.2
- 4.5.3
- 4.5.4
- 4.5.5
- 4.5.6
- 4.5.6.1
- 4.5.7
- 4.5.8
- 4.5.9
- 4.6.0
- 4.6.0-RC1
- 4.6.1
- 4.7.0
- 4.7.1
- 4.7.2
- 4.7.2.1
- 4.7.3
- 4.7.4
- 4.8.0
- 4.8.1
- 4.8.10
- 4.8.11
- 4.8.2
- 4.8.3
- 4.8.4
- 4.8.5
- 4.8.6
- 4.8.7
- 4.8.8
- 4.8.9
- 4.9.0
- 4.9.1
- 4.9.2
- 4.9.3
- 4.9.4
- 4.9.5
- 4.9.6
- 4.9.7
- Affected ranges
- ECOSYSTEM: ≥ 4.5.0-RC1, < 4.16.19
Update to 4.16.19
craftcms/cms Packagist
- Versions
- 5.0.0
- 5.0.0-RC1
- 5.0.1
- 5.0.2
- 5.0.3
- 5.0.4
- 5.0.5
- 5.0.6
- 5.1.0
- 5.1.1
- 5.1.10
- 5.1.2
- 5.1.3
- 5.1.4
- 5.1.5
- 5.1.6
- 5.1.7
- 5.1.8
- 5.1.9
- 5.2.0
- 5.2.0-beta.1
- 5.2.0-beta.2
- 5.2.0-beta.3
- 5.2.0-beta.4
- 5.2.0-beta.5
- 5.2.0-beta.6
- 5.2.1
- 5.2.10
- 5.2.2
- 5.2.3
- 5.2.4
- 5.2.4.1
- 5.2.5
- 5.2.6
- 5.2.7
- 5.2.8
- 5.2.9
- 5.3.0
- 5.3.0-beta.1
- 5.3.0-beta.2
- 5.3.0.1
- 5.3.0.2
- 5.3.0.3
- 5.3.1
- 5.3.2
- 5.3.3
- 5.3.4
- 5.3.5
- 5.3.6
- 5.4.0
- 5.4.0.1
- 5.4.1
- 5.4.10
- 5.4.10.1
- 5.4.2
- 5.4.3
- 5.4.4
- 5.4.5
- 5.4.5.1
- 5.4.6
- 5.4.7
- 5.4.7.1
- 5.4.8
- 5.4.9
- 5.5.0
- 5.5.0.1
- 5.5.1
- 5.5.1.1
- 5.5.10
- 5.5.2
- 5.5.3
- 5.5.4
- 5.5.5
- 5.5.6
- 5.5.6.1
- 5.5.7
- 5.5.8
- 5.5.9
- 5.6.0
- 5.6.0.1
- 5.6.0.2
- 5.6.1
- 5.6.10
- 5.6.10.1
- 5.6.10.2
- 5.6.11
- 5.6.12
- 5.6.13
- 5.6.14
- 5.6.15
- 5.6.16
- 5.6.17
- 5.6.2
- 5.6.3
- 5.6.4
- 5.6.5
- 5.6.5.1
- 5.6.6
- 5.6.7
- 5.6.8
- 5.6.9
- 5.6.9.1
- 5.7.0
- 5.7.0-beta.1
- 5.7.0-beta.2
- 5.7.1
- 5.7.1.1
- 5.7.10
- 5.7.11
- 5.7.2
- 5.7.3
- 5.7.4
- 5.7.5
- 5.7.6
- 5.7.7
- 5.7.8
- 5.7.8.1
- 5.7.8.2
- 5.7.9
- 5.8.0
- 5.8.1
- 5.8.10
- 5.8.11
- 5.8.12
- 5.8.13
- 5.8.13.1
- 5.8.13.2
- 5.8.14
- 5.8.15
- 5.8.16
- 5.8.17
- 5.8.18
- 5.8.19
- 5.8.2
- 5.8.20
- 5.8.21
- 5.8.22
- 5.8.3
- 5.8.4
- 5.8.5
- 5.8.6
- 5.8.7
- 5.8.8
- 5.8.9
- Affected ranges
- ECOSYSTEM: ≥ 5.0.0-RC1, < 5.8.23
Update to 5.8.23