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CVE-2026-58164 Apache CVE debrief

Apache Traffic Server has use-after-free and time-of-check/time-of-use errors in remap configuration handling. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue. The vulnerability could allow a remote attacker to potentially execute arbitrary code. Operators, platform administrators, vulnerability management teams, and security teams should be aware of this vulnerability and take steps to upgrade to a fixed version. The scope of affected deployments and specific configurations remains unclear, and 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.

Vendor
Apache
Product
Traffic Server
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-29
Original CVE updated
2026-08-03
Advisory published
2026-07-29
Advisory updated
2026-08-03

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58164 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58164

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-58164 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58164

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.