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CVE-2026-1709 Red Hat CVE debrief

A critical vulnerability, CVE-2026-1709, was found in Keylime, a security framework used for remote attestation of machine state. The Keylime registrar, since version 7.12.0, does not enforce client-side Transport Layer Security (TLS) authentication. This authentication bypass vulnerability allows unauthenticated clients with network access to perform administrative operations, including listing agents, retrieving public Trusted Platform Module (TPM) data, and deleting agents, by connecting without presenting a client certificate. The vulnerability has a CVSS score of 9.4 and is considered critical. The flaw was publicly disclosed on February 6, 2026, and the information was last modified on June 27, 2026.

Vendor
Red Hat
Product
Red Hat Enterprise Linux 10
CVSS
CRITICAL 9.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-02-06
Original CVE updated
2026-06-27
Advisory published
2026-02-06
Advisory updated
2026-06-27

Who should care

Organizations using Keylime for remote attestation and security monitoring should prioritize patching this vulnerability. Specifically, those with Keylime version 7.12.0 or later are affected and need to take immediate action. The vulnerability's high impact and ease of exploitation make it a prime target for attackers. Security teams and administrators responsible for Keylime deployments should assess their exposure and apply mitigations as soon as possible.

Technical summary

CVE-2026-1709 is an authentication bypass vulnerability in the Keylime registrar, which fails to enforce client-side TLS authentication. This allows unauthenticated access to administrative operations. The vulnerability exists in Keylime versions 7.12.0 and later. Attackers can exploit this flaw by connecting to the Keylime registrar without a client certificate, enabling them to list agents, retrieve TPM data, and delete agents. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H, indicating a high severity level.

Defensive priority

This vulnerability should be prioritized for immediate patching due to its critical severity and potential for exploitation. Keylime users should apply the necessary updates to prevent unauthorized access to their systems.

Recommended defensive actions

  • Apply the latest patches or updates to Keylime to enforce client-side TLS authentication.
  • Review and update Keylime configurations to ensure proper TLS authentication mechanisms are in place.
  • Monitor Keylime deployments for any suspicious activity or unauthorized access attempts.
  • Implement additional security measures, such as network segmentation or access controls, to limit the impact of a potential exploit.
  • Verify that all administrative operations are properly authenticated and authorized.

Evidence notes

The CVE-2026-1709 vulnerability was publicly disclosed on February 6, 2026, with the last modification made on June 27, 2026. The vulnerability affects Keylime version 7.12.0 and later. The CVSS score of 9.4 indicates a critical severity level. Multiple sources, including Red Hat and NVD, have documented this vulnerability, providing additional context and mitigation strategies.

Official resources

This article was generated with AI assistance based on the supplied source corpus and is intended for informational purposes only. It provides a summary of the CVE-2026-1709 vulnerability and recommended actions. Users are encouraged to to