Dashboard / CVE-2026-114639

CVE-2026-114639

HIGH
MEDIUM Priority: 0.02 BB Relevance: 74/100
Published: 2026-10-22 Modified: 2026-10-27 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: X
AT: Present
VC: None
VI: None
VA: None

Description

Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 contains an authentication bypass because a first request preauthenticated with an Authorization: Negotiate token authenticates a socket in the globally shared backend connection pool, which is never isolated. Unauthenticated attackers on separate frontend connections can be assigned that NTLM/Kerberos-bound socket and perform reads or writes with the victim's identity.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
traefik traefik 2.11.0 – 2.11.58
traefik traefik 3.0.0 – 3.7.14
traefik traefik 2.11.0 – 2.11.58
traefik traefik 3.0.0 – 3.7.14

References & Advisories (2)

Bug Bounty Relevance

74 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.0 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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

EPSS — Exploitation Probability

0.29%
Raw Score 0.002950
Percentile 22.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00295
2026-10-28
0.00295

Intelligence Sources

nvd ref →

External Links