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CVE-2026-58161 Apache CVE debrief

Apache Traffic Server can crash from null dereferences and dangling references in TLS and SNI 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 is considered critical, with a CVSS score of 9.2, and can lead to crashes and potential system instability. Affected users should prioritize upgrading to a fixed version to mitigate the risk. The issue was publicly disclosed on 2026-07-29 and has been analyzed by the NVD.

Vendor
Apache
Product
Traffic Server
CVSS
CRITICAL 9.2
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 upgrade to version 9.2.15 or 10.1.4. Operators, administrators, and security teams managing these versions need to assess their exposure and plan for remediation. Vulnerability management and security teams should prioritize and track this vulnerability for potential impact on their environments.

Technical summary

Apache Traffic Server can crash from null dereferences and dangling references in TLS and SNI handling. Affected versions include 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The vulnerability can be addressed by upgrading to version 9.2.15 or 10.1.4. This fix eliminates the null dereferences and dangling references that cause the crashes. The issue is related to the handling of TLS and SNI, which are critical components in secure communication protocols. By upgrading to a fixed version, users can prevent potential crashes and ensure the stability of their systems.

Defensive priority

Upgrade to version 9.2.15 or 10.1.4. Inventory Apache Traffic Server instances for version checks.

Recommended defensive actions

  • Upgrade to version 9.2.15 or 10.1.4
  • Inventory Apache Traffic Server instances for version checks
  • Monitor for potential crashes and null dereferences
  • 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

Official CVE record and NVD detail confirm Apache Traffic Server vulnerability. Vendor advisory recommends upgrading to version 9.2.15 or 10.1.4. Evidence from the CVE record and NVD detail indicate 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 are affected. Users should verify their deployments and plan for upgrades. Defensive measures include inventory checks and monitoring for potential crashes.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-29T10:16:41.780Z and has not been modified since then. The NVD entry is currently Analyzed.