CVE-2026-45363
CVE-2026-45363: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.4
High [CVE-2026-45363] Authentication bypass due to empty key in HMAC verification
CVE-2026-45363Source published Source updated
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. A remote attacker can exploit this vulnerability by crafting a malicious token that is accepted due to an empty key being used in the HMAC…
- Affected products in this advisory
- Red Hat Satellite 6.16 for RHEL 8
- Red Hat Satellite 6.16 for RHEL 9
- Red Hat Satellite 6.17 for RHEL 9
- Red Hat Satellite 6.18 for RHEL 9
1 more entries in the full advisory.
- Source-reported affected versions
- < 2.10.3
- < 3.2.0
- Source-reported fixed versions
- 2.10.3
- 3.2.0
- rubygem-jwt-0:2.10.3-1.el8sat
- rubygem-jwt-0:2.10.3-1.el9sat
7 more entries in the full advisory.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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