CVE-2026-114458: medium-severity vulnerability in pbuchbinder mod_qos
Mod_qos: undersized connection-monitor scratch array permits heap buffer overflow
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.9epss 0.3%
A flaw was found in mod_qos. An unauthenticated remote attacker can cause a Denial of Service (DoS) by maintaining numerous concurrent low-rate connections to a target server. When connection rate monitoring is active, the module fails to verify array boundaries when recording client IP addresses, allowing more connection records to be added than the allocated buffer can hold. This issue leads to heap memory corruption, which can crash the web server process.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
pbuchbinder · mod_qosRelated CVEs — pbuchbinder mod_qos
In the same product, most dangerous first.
CVE-2026-114459LOWMod_qos: out-of-bounds reads in response-body substring matchingEPSS 0.4%CVE-2026-114457LOWMod_qos: missing nul termination in json value escaping permits out-of-bounds readsEPSS 0.4%CVE-2026-114460MEDIUMMod_qos: query truncation during json body merging permits security-rule bypassEPSS 0.3%