Vulnerability in Rack Rack-session
CVE-2025-46336
Rack::Session is a session management implementation for Rack. In versions starting from 2.0.0 to before 2.1.1, when using the Rack::Session::Pool middleware, and provided the attacker can acquire a session cookie (already a major issue)…
Vulnerability class: Race Condition
EPSS: 0.001 (29.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Rack Rack-session — versions >= 2.0.0, < 2.1.1
Weakness classification (CWE)
References
- https://github.com/rack/rack-session/security/advisories/GHSA-9j94-67jr-4cqj (x_refsource_CONFIRM)
- https://github.com/rack/rack/security/advisories/GHSA-vpfw-47h7-xj4g (x_refsource_MISC)
- https://github.com/rack/rack-session/commit/c28c4a8c1861d814e09f2ae48264ac4c40be2d3b (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-46336?
- CVE-2025-46336 is a medium-severity vulnerability in Rack Rack-session, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.2/10. Published 2025-05-08.
- How severe is CVE-2025-46336?
- Medium severity. CVSS v3 base score is 4.2 out of 10.