CVE-2026-85597

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 28.5% of scored records. A rank, not a probability.

NVD base score

8.2 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-08.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-04 11:30Z1 MO AGO

Last updated

2026-10-08 15:51Z21 DAYS AGO

Reserved

2026-09-04

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.2)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-863Incorrect AuthorizationClass
• CWE-303Incorrect Implementation of Authentication AlgorithmBase

Data version

5.2

Document digest

55a2702de4328da524f7454f80f705377436cc32bd497bf803f4be0d8dcbfb1a

• github.comGitHub Security Advisory (GHSA-g55h-rg46-x9c5)https://github.com/traefik/traefik/security/advisories/GHSA-g55h-rg46-x9c5vendor-advisory
• www.vulncheck.comVulnCheck Advisory: Traefik before v2.11.55 mTLS Bypass via TLS Option Conflicthttps://www.vulncheck.com/advisories/traefik-before-2.11.55-mtls-bypass-via-tls-option-conflictthird-party-advisory