CVE-2026-111810 Apache Software Foundation CVE debrief

Who should care

Defenders and administrators of Apache Traffic Server instances should assess exposure and prioritize upgrading to patched versions. This vulnerability affects operators responsible for maintaining and securing Apache Traffic Server deployments. Security teams should review the vulnerability's impact on their organization's assets and implement necessary mitigations. Platform administrators must ensure that all affected instances are identified and remedi-

Why it matters

Defenders should care about CVE-2026-111810 as it affects Apache Traffic Server, potentially leading to log-flood denial of service attacks. Administrators should assess exposure, prioritize upgrading to patched versions, and monitor for unusual log activity.

• Potential log-flood denial of service attacks
• Need to verify and upgrade to patched versions
• Monitoring for unusual log activity is recommended

Technical summary

Apache Traffic Server 9.2.15, 10.1.4, and 10.2.0 are vulnerable to a log-flood denial of service due to unthrottled diagnostic logging for internal @ headers. This vulnerability allows an attacker to generate excessive log data by sending requests with many internal @ headers, potentially overwhelming the system. Defenders should prioritize upgrading to patched versions to prevent potential log-flood denial of service attacks. The vulnerability does not require authentication or complex exploitation techniques, making it a significant risk for affected deployments.

Defensive priority

Defenders should prioritize upgrading Apache Traffic Server to the patched versions to prevent potential log-flood denial of service attacks.

Recommended defensive actions

• Upgrade Apache Traffic Server to version 9.2.16, 10.1.5, or 10.2.1
• Review and adjust logging configurations to prevent similar issues
• Monitor Apache Traffic Server for unusual log activity
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• 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

Evidence notes

The CVE record and source item provide details on the vulnerability. Additional information from other sources is limited. Defenders should verify affected Apache Traffic Server deployments and review official advisories for specific guidance. Evidence is based on CVE Program and NVD details, with limited additional context available. Further verification is recommended to ensure accurate exposure assessment.

Sources and 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.