TI-2026-37740 Aliases CVE-2026-52023 GHSA-3vmm-j973-v9x5

An issue in kamailio v.6.1.1 and before allows a remote attacker to cause a denial of…

LOW 39CWE-362Published 2026-09-01 · Updated 2026-10-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-415 and the CVSS impact.

Summary

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 pcscf_save_pending/save_pending path and security-agreement parsing in sec_agree.c:parse_sec_agree()

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00448 39th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:kamailio:kamailio::::::::	up to 6.1.1	Vulnerable	kamailio

cpe:2.3:a:kamailio:kamailio:*:*:*:*:*:*:*:* Versions up to 6.1.1 Vulnerable ·kamailio

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-52023
2026-10-03 Alias added: GHSA-3vmm-j973-v9x5
2026-10-19 Weakness changed · CISA ADP
2026-10-21 Priority changed: MEDIUM → LOW

References

Exploit 1

https://github.com/kamailio/kamailio/issues/4671

Patch 1

https://github.com/kamailio/kamailio/commit/722c06b3efc53ccb369ce812c685c7d069508187

TI-2020-16681 The Kamailio SIP before 5.5.0 server mishandles INVITE requests with duplicated fields… CVSS 3.1CRITICAL 9.8
TI-2018-06372 A Buffer Overflow issue was discovered in Kamailio before 4.4.7, 5.0.x before 5.0.6, and… CVSS 3.0CRITICAL 9.8
TI-2018-10598 In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with a double "To"… CVSS 3.0CRITICAL 9.8
TI-2016-02145 Heap-based buffer overflow in the encode_msg function in encode_msg.c in the SEAS module… CVSS 3.0CRITICAL 9.8
TI-2025-11190 Kamailio Grammar Rule cfg.y yyerror_at null pointer dereference CVSS 4.0MEDIUM 4.8
TI-2025-11189 Kamailio rvalue.c rve_is_constant null pointer dereference CVSS 4.0MEDIUM 4.8

See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences