{"id":"CVE-2026-49998","summary":"Centrifugo: Dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass","details":"Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.1, Centrifugo dynamic JWKS endpoint verification could reuse a key for one allowed issuer to verify a JWT for another allowed issuer because the JWKS cache and singleflight lookup were keyed only by JWT header kid, not by the resolved JWKS endpoint, issuer, audience, or trust-domain namespace, affecting client.token.jwks_public_endpoint, client.subscription_token.jwks_public_endpoint, internal/jwks/cache.go, and internal/jwks/manager.go. This issue is fixed in version 6.8.1.","aliases":["GHSA-g6vg-wj8f-48cj","GO-2026-5872"],"modified":"2026-08-04T11:51:06.005381568Z","published":"2026-07-16T19:33:33.147Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49998.json"},"references":[{"type":"WEB","url":"https://github.com/centrifugal/centrifugo/releases/tag/v6.8.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49998.json"},{"type":"ADVISORY","url":"https://github.com/centrifugal/centrifugo/security/advisories/GHSA-g6vg-wj8f-48cj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49998"},{"type":"FIX","url":"https://github.com/centrifugal/centrifugo/commit/15d785015c6f318c1b68ea40b813699c9f8bd2c4"},{"type":"FIX","url":"https://github.com/centrifugal/centrifugo/pull/1142"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/centrifugal/centrifugo","events":[{"introduced":"0"},{"fixed":"c1246c5472ff9700868ee768e72de2911a3e4f2b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"6.8.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v6.8.0","v6.7.2","v6.7.1","v6.7.0","v6.6.2","v6.6.1","v6.6.0","v6.5.2","v6.5.1","v6.5.0","v6.4.0","v6.3.1","v6.3.0","v6.2.5","v6.2.4","v6.2.3","v6.2.2","v6.2.1","v6.2.0","v6.1.0","v6.0.3","v6.0.2","v6.0.1","v6.0.0","v5.4.9","v5.4.8","v5.4.7","v5.4.6","v5.4.5","v5.4.4","v5.4.3","v5.4.2","v5.4.1","v5.4.0","v5.3.2","v5.3.1","v5.3.0","v5.2.2","v5.2.1","v5.2.0","v5.1.2","v5.1.1","v5.1.0","v5.0.4","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v4.1.3","v4.1.2","v4.1.1","v4.1.0","v4.0.4","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.1","v3.1.0","v3.0.5","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.8.6","v2.8.5","v2.8.4","v2.8.3","v2.8.2","v2.8.1","v2.8.0","v2.7.2","v2.7.1","v2.7.0","v2.6.2","v2.6.1","v2.5.1","v2.6.0","v2.5.0","v2.4.0","v2.3.1","v2.3.0","v2.2.7","v2.2.6","v2.2.5","v2.2.4","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.0","v2.0.2","v2.0.1","v2.0.0","v1.8.0","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.5","v1.6.4","v1.6.3","v1.6.2","v1.6.1","v1.6.0","v1.5.1","v1.5.0","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v0.3.0","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.2.0","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49998.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N"}]}