CVE-2026-58164 Apache CVE debrief

Who should care

Users of Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3 should be aware of this vulnerability and take steps to upgrade to a fixed version. This includes operators, platform administrators, vulnerability management teams, and security teams responsible for ensuring the security and integrity of their systems and data.

Technical summary

The vulnerability is caused by use-after-free and time-of-check/time-of-use errors in remap configuration handling in Apache Traffic Server. This could allow a remote attacker to potentially execute arbitrary code. The issue affects Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3, and upgrading to version 9.2.15 or 10.1.4 is recommended to fix the issue.

Defensive priority

High priority due to high CVSS score of 8.3 and potential for remote exploitation.

Recommended defensive actions

• Upgrade to version 9.2.15 or 10.1.4
• Review and update affected versions
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, affected versions, and recommended upgrades. However, the scope of affected deployments and specific configurations remains unclear. Defenders should verify Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3 for potential exposure, review remap configuration handling, and assess the impact of use-after-free and time-of-check/time-of-use errors.

Official resources