{"apiVersion":"1.0","identifier":"CVE-2026-50149","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.","publishedAt":"2026-08-19T15:17:08","lastModifiedAt":"2026-08-25T03:16:55","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50149","cvssScore":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","epssProbability":0.00147,"riskScore":0.66,"affectedProduct":"Contour","affectedVersions":">=1.23.0,<1.33.5","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-50149","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-50149","en":"https://www.redsauce.net/en/cves/CVE-2026-50149","fr":"https://www.redsauce.net/fr/cves/CVE-2026-50149","pt":"https://www.redsauce.net/pt/cves/CVE-2026-50149","de":"https://www.redsauce.net/de/cves/CVE-2026-50149","sk":"https://www.redsauce.net/sk/cves/CVE-2026-50149","el":"https://www.redsauce.net/el/cves/CVE-2026-50149"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-50149"}}