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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-114460
StatePUBLISHED
Assignerfedora
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-22 07:16:42 UTC
Updated2026-10-22 07:16:42 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-193 | CWE-193 Off-by-one Error

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Pbuchbinder Mod Qos affected 11.74 custom Not specified
CNA Pbuchbinder Mod Qos affected 11.76 custom Not specified
CNA Pbuchbinder Mod Qos affected 11.79 custom Not specified

References

ReferenceSourceLinkTags
access.redhat.com/security/cve/CVE-2026-114460 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Robin "drzobin" Larsson for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-10-17T14:30:17.000ZReported to Red Hat.
CNA2026-10-21T14:45:26.000ZMade public.

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