CVE-2026-29777

medium Red Hat
CVSS v3 Base Score
6.8
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 98% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Published: March 11, 2026 (64 days ago)
Last Modified: March 11, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in Traefik. A tenant with write access to an HTTPRoute resource can exploit this vulnerability by injecting specially crafted rule tokens into Traefik's router rule language through unsanitized header or query parameter match values. This allows the attacker to bypass listener hostname constraints in shared gateway deployments, leading to the redirection of traffic intended for legitimate hostnames to attacker-controlled backends.

CWE

CWE-94

Affected Products

Red Hat OpenShift Dev Spaces

References

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