Improper Certificate Validation Affecting github.com/projectcontour/contour/internal/dag package, versions >=1.23.0 <1.33.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMPROJECTCONTOURCONTOURINTERNALDAG-17809967
- published3 Jul 2026
- disclosed2 Jul 2026
- creditUnknown
Introduced: 2 Jul 2026
CVE-2026-50149 Â (opens in a new tab)How to fix?
Upgrade github.com/projectcontour/contour/internal/dag to version 1.33.5 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation in the processing of requests to virtual hosts configured with both tls.enableFallbackCertificate and jwtProviders. An attacker can bypass authentication controls by sending requests without a valid token when the client does not provide a recognized TLS SNI or omits SNI entirely. This is only exploitable if both tls.enableFallbackCertificate and jwtProviders are enabled simultaneously on the same virtual host.
Workaround
This vulnerability can be mitigated by ensuring that tls.enableFallbackCertificate and jwtProviders are not enabled together on the same virtual host. Remove one of the two settings to avoid the invalid configuration.