{"cve":"CVE-2026-50149","nvd":{"published":"2026-08-19T15:17:08.710","modified":"2026-09-18T20:09:01.757","status":"Deferred","description":"Contour is a Kubernetes ingress controller using Envoy proxy. In versions 1.23.0 through 1.33.4, when an `HTTPProxy` is configured with incompatible combination of both `.spec.virtualhost.tls.enableFallbackCertificate: true` and `.spec.virtualhost.jwtProviders`, Contour does not reject the configuration. Consequently, requests from clients that do not send TLS SNI or send an unrecognized SNI (one that does not match any `HTTPProxy` FQDN) bypass configured JWT verification and are proxied to upstream services without a valid token. This issue is fixed in Contour v1.33.5. Contour now rejects and marks invalid any `HTTPProxy` resources that combine `.spec.virtualhost.tls.enableFallbackCertificate: true` with `.spec.virtualhost.jwtProviders`. Affected resources will receive a status  condition with the error reason `TLSIncompatibleFeatures`. As a workaround, do not enable `.spec.virtualhost.tls.enableFallbackCertificate` on `HTTPProxy` resources that also define `.spec.virtualhost.jwtProviders`. Remove one of the two settings to avoid the invalid configuration.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","score":6.5},"cwes":["CWE-295"],"references":["https://github.com/projectcontour/contour/security/advisories/GHSA-g3xr-5w5j-w4q4"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-50149","score":0.00185,"percentile":0.08117,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-g3xr-5w5j-w4q4","url":"https://osv.dev/vulnerability/GHSA-g3xr-5w5j-w4q4","summary":"Contour has Improper JWT Verification for Non-SNI Requests on Virtual Hosts with Fallback Certificate Enabled","modified":"2026-09-10T03:50:51.915459491Z","packages":[{"ecosystem":"Go","name":"github.com/projectcontour/contour","purl":"pkg:golang/github.com/projectcontour/contour","ranges":[">=1.23.0 <1.33.5"],"fixed":["1.33.5"]}]},{"id":"GO-2026-5889","url":"https://osv.dev/vulnerability/GO-2026-5889","summary":"Contour has Improper JWT Verification for Non-SNI Requests on Virtual Hosts with Fallback Certificate Enabled in github.com/projectcontour/contour","modified":"2026-08-26T01:11:36.175948748Z","packages":[{"ecosystem":"Go","name":"github.com/projectcontour/contour","purl":"pkg:golang/github.com/projectcontour/contour","ranges":[">=1.23.0 <1.33.5"],"fixed":["1.33.5"]}]}],"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."]}