CVE-2026-35579

high Red Hat
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score
0.1%
Exploitation probability in 30 days
Top 75% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Published: May 5, 2026 (65 days ago)
Last Modified: May 5, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in CoreDNS. An unauthenticated network attacker can exploit incorrect handling of TSIG (Transaction Signature) authentication in the gRPC, QUIC, DoH (DNS over HTTPS), and DoH3 transport implementations. This vulnerability allows an attacker to bypass TSIG protection, leading to unauthorized access to functionalities such as zone transfers and dynamic DNS updates. For DoH and DoH3, the issue is more severe as any request with a TSIG record is treated as authenticated, even with an invalid key.

CWE

CWE-303

Affected Products

Red Hat Advanced Cluster Management for Kubernetes 2Red Hat OpenShift Container Platform 4

References

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