CVE-2026-114457 pbuchbinder CVE debrief

Who should care

Defenders and administrators using mod_qos in Apache configurations should assess exposure and prioritize verification and patching to prevent potential Denial of Service (DoS) attacks.

Why it matters

CVE-2026-114457 is a flaw in mod_qos that allows an unauthenticated remote attacker to cause a Denial of Service (DoS). Defenders and administrators using mod_qos in Apache configurations should assess exposure and prioritize verification and patching. The CVE record and source item provide details, but additional verification is needed to confirm affected versions and remediation.

• Potential Denial of Service (DoS) attacks against Apache worker processes
• Need to verify mod_qos versions and configurations for exposure
• Priority on applying patches or updates to prevent exploitation
• Limited information on affected versions and potential impact

Technical summary

A flaw in mod_qos allows an unauthenticated remote attacker to cause a Denial of Service (DoS) by sending a specially crafted JSON request when JSON body filtering is enabled. The module reads past allocated memory boundaries due to improper string termination during percent-encoded input processing, causing an Apache worker process to crash. The vulnerability affects mod_qos in Apache configurations, and defenders should assess exposure and prioritize verification and patching to prevent potential Denial of Service (DoS) attacks.

Defensive priority

Assess exposure, prioritize verification, and apply patches for mod_qos

Recommended defensive actions

• Assess exposure to mod_qos in Apache configurations
• Verify if mod_qos versions 11.74, 11.76, or 11.79 are in use
• Apply patches or updates provided by the vendor
• Monitor for potential Denial of Service (DoS) 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

Evidence notes

The CVE record and source item provide details on the mod_qos vulnerability, but additional verification is needed to confirm affected versions and remediation. Limited information is available on affected versions and potential impact. Defenders should verify mod_qos versions and configurations for exposure, and apply patches or updates provided by the vendor. The vulnerability allows an unauthenticated remote attacker to cause a Denial of Service (DoS) by sending a specially crafted JSON request when JSON body filtering is enabled.

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.