CVE-2026-41263

medium Red Hat
CVSS v3 Base Score
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 94% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Published: April 30, 2026 (70 days ago)
Last Modified: April 30, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in Traefik. A remote attacker can exploit a timing side-channel vulnerability in Traefik's BasicAuth middleware. This flaw allows an attacker to enumerate valid usernames by observing differences in authentication response times. The vulnerability arises because a constant-time comparison, intended to prevent such attacks, short-circuits, revealing whether a username exists.

CWE

CWE-208

Affected Products

Red Hat OpenShift Dev Spaces

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com 🔗 github.com