An issue in kamailio v.6.1.1 and before allows a remote attacker to cause a denial of service via the ims_registrar_pcscf module, specifically the… (CVE-2026-52023)
Description
A denial of service vulnerability exists in Kamailio versions 6.1.1 and earlier due to an issue in the ims_registrar_pcscf module. The flaw specifically involves the pcscf_save_pending/save_pending path and security-agreement parsing in the sec_agree.c:parse_sec_agree() function. This vulnerability allows a remote attacker to cause a denial of service without requiring authentication.
CVSS v3.1
Score 7.5high
Affected software
pkg:deb/ubuntu/kamailio?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/kamailio?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/kamailio?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/kamailio?arch=source&distro=jammypkg:deb/ubuntu/kamailio?arch=source&distro=noblepkg:deb/ubuntu/kamailio?arch=source&distro=stonkingpkg:deb/ubuntu/kamailio?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Kamailio versions 6.1.1 and before contain a vulnerability in the ims_registrar_pcscf module that can be triggered remotely to cause a denial of service. The issue arises from improper handling in the pcscf_save_pending/save_pending code path and the parsing of security agreements in the sec_agree.c:parse_sec_agree() function. The vulnerability does not impact confidentiality or integrity but results in service disruption.
Potential Impact
The vulnerability allows an unauthenticated remote attacker to cause a denial of service condition, disrupting the availability of the affected Kamailio service. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-52023
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f6082cdf04f6566640c7
Added to database: 10/17/2026, 22:26:16 UTC
Last enriched: 10/18/2026, 00:56:25 UTC
Last updated: 10/18/2026, 00:56:25 UTC
Views: 4
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