Vulnerability · Published Oct 22, 2026 · Assigned by fedora

CVE-2026-114460Mod_qos: query truncation during json body merging permits security-rule bypass

Medium 5.3

In plain English

A medium-severity security flaw in mod_qos from pbuchbinder. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 80.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A flaw was found in mod_qos. An off-by-one pointer calculation error occurs when merging request body parameters with an existing URL query, which truncates the query string during security evaluation while leaving the actual request unchanged. An unauthenticated remote attacker could exploit this vulnerability by submitting a crafted request that conceals prohibited values from inspection, resulting in a bypass of configured security rules.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:14	mod-qos	no fix listed	DEBIAN-CVE-2026-114460
Ubuntu:26.04:LTS	mod-qos	no fix listed	UBUNTU-CVE-2026-114460
Ubuntu:26.10	mod-qos	no fix listed	UBUNTU-CVE-2026-114460

Affected products (as reported)

Vendor	Product	Versions
pbuchbinder	mod_qos	11.7411.7611.79

Weakness: CWE-193 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://access.redhat.com/security/cve/CVE-2026-114460 vdb-entry, x_refsource_REDHAT
RHBZ#2558401 issue-tracking, x_refsource_REDHAT