Vulnerability details
CVE-2026-114639
traefik traefik
Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection Pool
CVSS 4.0
7.0High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.0High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 8.7High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| traefik | traefik | 2.11.0 ≤ v < 2.11.58 | CVEProject cvelistV5 (CNA) |
| traefik | traefik | 3.0.0 ≤ v < 3.7.14 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-10-22
- Last updated
- 2026-11-04
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.29%
Probability of exploitation in 30 days
22.2%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-287Improper Authentication