CVE-2026-52022: An issue in kamailio v.6.1.1 and before allows a remote attacker to cause a denial of service via the IMS P-CS

Q: How do I fix CVE-2026-52022?

kamailio: upgrade to newer than 6.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-52022 being exploited?

CVE-2026-52022 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-52022 affect?

CVE-2026-52022 affects kamailio. Severity is high (CVSS 7.5). An issue in kamailio v.6.1.1 and before allows a remote attacker to cause a denial of service via the IMS P-CSCF registration handling components

Q: How urgent is CVE-2026-52022?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-52022 is a high-severity flaw (CVSS 7.5) affecting kamailio. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in kamailio v.6.1.1 and before allows a remote attacker to cause a denial of service via the IMS P-CSCF registration handling components

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-400
Published	2026-09-01
Last modified	2026-09-04

Publisher (CNA): MITRE · Vendor: kamailio

Last updated 2026-09-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-01 18:17 UTCPublished CVE record published
2026-09-04 20:24 UTCUpdated Record last modified

kamailio kamailio UPGRADE

Affected: <= 6.1.1

Fixed in: newer than 6.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kamailio || rpm -q kamailio || kamailio --version

2. UPGRADE to newer than 6.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kamailio

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kamailio

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-52022?

kamailio: upgrade to newer than 6.1.1. Exact commands for each OS are on this page.

Is CVE-2026-52022 being exploited?

CVE-2026-52022 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-52022 affect?

CVE-2026-52022 affects kamailio. Severity is high (CVSS 7.5). An issue in kamailio v.6.1.1 and before allows a remote attacker to cause a denial of service via the IMS P-CSCF registration handling components

How urgent is CVE-2026-52022?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-52023 HIGH 7.5 UPGRADE An issue in kamailio v.6.1.1 and before allows a remote attacker to cause a denial of service via the ims_regi

References

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