CVE-2026-32595
Description
A flaw was found in Traefik. An unauthenticated attacker can exploit a timing attack vulnerability in the BasicAuth middleware. By observing the time it takes for the middleware to respond, an attacker can determine if a submitted username is valid or not. This information disclosure allows for username enumeration.
Statement
MODERATE. The vulnerability in Traefik's BasicAuth middleware allows an unauthenticated attacker to perform username enumeration through a timing attack. By observing response times, an attacker can distinguish valid usernames from invalid ones. This information disclosure could aid in further targeted attacks against Red Hat OpenShift Dev Spaces deployments utilizing Traefik with BasicAuth.
Mitigation
To mitigate the risk of username enumeration, restrict network access to the Traefik instance using firewall rules or network policies, allowing connections only from trusted sources. If BasicAuth is not strictly required, consider disabling or removing the BasicAuth middleware configuration.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.3 | 3.7 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | High | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | Low | Low | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality,Access Control
Technical Impact: Read Application Data; Bypass Protection Mechanism
Frequently Asked Questions
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