Bug 2528835 (CVE-2026-85597)
| Summary: | CVE-2026-85597 github.com/traefik/traefik: Traefik: Authentication bypass via TLS option conflict | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | anjoseph, jprabhak, sdawley, wtam |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in Traefik. This vulnerability allows unauthenticated attackers to bypass client-certificate authentication. By creating conflicting Transport Layer Security (TLS) options on multi-host routers, attackers can exploit shared TLS resolution across multiple hostnames in a single router rule. This causes the strict mutual TLS (mTLS) requirement to fall back to default options, enabling access to protected backends.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
OSIDB Bzimport
2026-09-04 18:22:11 UTC
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