CRITICALVulnerability
CVE-2026-85597
Traefik before v2.11.55 and v3.0.0 through v3.7.10 contain a TLS option conflict resolution vulnerability that allows unauthenticated attackers to bypass client-certificate authentication by creating conflicting TLS options on multi-host routers. Attackers can reach protected backends by exploiting shared TLS resolution across multiple hostnames in a single router rule, causing the strict mTLS requirement to fall back to default options for all hosts.
Properties
- severity
- CRITICAL
- score
- 9.1
- cve_id
- CVE-2026-85597
- signal_observed_at
- 2026-09-16T21:37:07+00:00
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- published_at
- 2026-09-04T12:17:23.210
- last_modified
- 2026-09-16T20:42:21.680
Related Entities (3)
HAS_WEAKNESS (1)
→[Weakness]Incorrect Authorization
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (1)
→[Product]
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