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CVE-2026-58154 Apache CVE debrief

Apache Traffic Server can write out of bounds or overflow integers while parsing MIME and HTTP headers. 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 has been publicly disclosed and is considered critical. Affected systems may experience potential operational impact due to the severity of this vulnerability.

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 be aware of this vulnerability and take steps to mitigate it. This includes upgrading to a fixed version, applying patches or mitigations, and reviewing compensating controls. Security teams and vulnerability management teams should prioritize this vulnerability due to its critical severity and potential impact on affected systems.

Technical summary

The Apache Traffic Server can write out of bounds or overflow integers while parsing MIME and HTTP headers. This issue affects Apache Traffic Server versions from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, and 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 has been publicly disclosed and is considered critical. Security teams should prioritize this vulnerability due to its critical severity and potential impact on affected systems. Defensive measures include upgrading to a fixed version, applying patches or mitigations, and reviewing compensating controls.

Defensive priority

Upgrade to version 9.2.15 or 10.1.4.

Recommended defensive actions

  • Upgrade to version 9.2.15 or 10.1.4.
  • Inventory and verify affected versions of Apache Traffic Server.
  • Apply patches or mitigations as recommended by the vendor.
  • 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 was published on 2026-07-29T09:16:29.743Z and was last modified on 2026-08-03T13:40:26.917Z. The NVD entry is currently Analyzed. The Apache Traffic Server can write out of bounds or overflow integers while parsing MIME and HTTP headers, affecting versions from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, and 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. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58154 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58154

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

  • CVE-2026-58154 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58154

    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.