DEBIAN-CVE-2026-45363
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-45363
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-45363.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-45363
- Upstream
- Published
- 2026-07-14T22:16:54Z
- Modified
- 2026-09-18T18:00:10Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decode(token, '', true, algorithm: 'HS256') accepts an attacker-forged token because OpenSSL::HMAC.digest('SHA256', '', payload) returns a valid digest under an empty key and no empty-key precondition exists in the HMAC algorithm. The same path is reached when a keyfinder block or key_finder: argument returns an empty string, nil, or an array containing nil for an unknown key, affecting HS256, HS384, and HS512 verification through JWT.decode and JWT::EncodedToken#verify_signature!. This issue is fixed in versions 2.10.3 and 3.2.0.
- References
Affected packages
Debian:12 / ruby-jwt
Package
- Name
- ruby-jwt
- Purl
- pkg:deb/debian/ruby-jwt?arch=source&distro=bookworm
Debian:13 / ruby-jwt
Package
- Name
- ruby-jwt
- Purl
- pkg:deb/debian/ruby-jwt?arch=source&distro=trixie
Debian:14 / ruby-jwt
Package
- Name
- ruby-jwt
- Purl
- pkg:deb/debian/ruby-jwt?arch=source&distro=forky