P4Verified

CVE-2026-85597: traefik before 2.11.55 (exclusive), from 3.0.0 (inclusive), before 3.7.11 (exclusive), 0 to before 2.11.55 (+1 more…

CVE-2026-85597. CVSS 3.1 base score 9.1 (CRITICAL, NVD). EPSS 0.00351 (percentile 0.26615), scored 2026-10-06.

Affected technology

traefik · before 2.11.55 (exclusive)
traefik

traefik · from 3.0.0 (inclusive), before 3.7.11 (exclusive)
traefik

traefik · 0 to before 2.11.55
traefik

traefik · 3.0.0 through 3.7.10
traefik

Description’s affected range: before v2.11.55 and v3.0.0 through v3.7.10

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Unauthenticated attackers can bypass client-certificate authentication by creating conflicting TLS options on multi-host routers. Vendor/CNA’s CVSS 4.0 assessment (base score 8.2/10) rates confidentiality impact as high; integrity and availability impact as none.

Published 2026-10-08 17:34:45.165431+00:00

CWE: CWE-863
CCR priority: 36.5 /100 (P4)
CVSS 3.1: 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · NVD
EPSS: 0.00351 · percentile 0.26719 · 2026-10-08
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-08 17:36:22.845483+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-08 17:32:11.049884+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-85597.html