CVE-2026-114637 Traefik - Authentication Bypass

Traefik >= 3.2.0 < 3.7.14 contains an authentication bypass caused by failure to pin NTLM/Negotiate-authenticated backend connections in the experimental FastProxy connection pool, letting unauthenticated clients read victim data and act as that victim.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.30% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Information Disclosure, Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Published
22 October 2026
Updated
23 October 2026
Weakness
CWE-488

Vendor fix

Upgrade to version 3.7.14 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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