{"cve":"CVE-2026-49998","nvd":{"published":"2026-07-16T20:16:45.290","modified":"2026-10-24T20:10:00.137","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","score":8.2},"cwes":["CWE-347"],"references":["https://github.com/centrifugal/centrifugo/commit/15d785015c6f318c1b68ea40b813699c9f8bd2c4","https://github.com/centrifugal/centrifugo/pull/1142","https://github.com/centrifugal/centrifugo/releases/tag/v6.8.1","https://github.com/centrifugal/centrifugo/security/advisories/GHSA-g6vg-wj8f-48cj","https://github.com/centrifugal/centrifugo/security/advisories/GHSA-g6vg-wj8f-48cj"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:08.599881581+00:00"},"epss":{"cve":"CVE-2026-49998","score":0.0022,"percentile":0.12439,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-g6vg-wj8f-48cj","url":"https://osv.dev/vulnerability/GHSA-g6vg-wj8f-48cj","summary":"Centrifugo's dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass","modified":"2026-07-07T16:11:15.854965402Z","packages":[{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v6","purl":"pkg:golang/github.com/centrifugal/centrifugo/v6","ranges":["<6.8.1"],"fixed":["6.8.1"]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v5","purl":"pkg:golang/github.com/centrifugal/centrifugo/v5","ranges":["<=5.4.9"],"fixed":[]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v4","purl":"pkg:golang/github.com/centrifugal/centrifugo/v4","ranges":["<=4.1.5"],"fixed":[]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v3","purl":"pkg:golang/github.com/centrifugal/centrifugo/v3","ranges":["<=3.2.3"],"fixed":[]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo","purl":"pkg:golang/github.com/centrifugal/centrifugo","ranges":["<=2.4.0"],"fixed":[]}]},{"id":"GO-2026-5872","url":"https://osv.dev/vulnerability/GO-2026-5872","summary":"Centrifugo's dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass in github.com/centrifugal/centrifugo","modified":"2026-07-07T16:01:31.678782455Z","packages":[{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo","purl":"pkg:golang/github.com/centrifugal/centrifugo","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v3","purl":"pkg:golang/github.com/centrifugal/centrifugo/v3","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v4","purl":"pkg:golang/github.com/centrifugal/centrifugo/v4","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v5","purl":"pkg:golang/github.com/centrifugal/centrifugo/v5","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/centrifugal/centrifugo/v6","purl":"pkg:golang/github.com/centrifugal/centrifugo/v6","ranges":["<6.8.1"],"fixed":["6.8.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}