CVE-2026-106803: Kamailio · Stack-based Buffer Overflow Exists
Source GCVE Database
Not known to be exploited.
Data as of 2 Nov 2026, 19:29 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 2 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubkamailio/kamailiopkg:github/kamailio/kamailioOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
Kamailio versions 6.1.3 and 6.1.4 contain a stack-based buffer overflow vulnerability in the ims_registrar_pcscf module. The flaw occurs when processing a crafted application/reginfo+xml NOTIFY message, where an attacker-controlled port value is copied into a fixed 5-byte stack buffer without length validation. This can lead to stack corruption and termination of the P-CSCF process, causing a denial of service. The vulnerability can be triggered by an unauthenticated remote attacker.
References
- nvd.nist.gov/vuln/detail/CVE-2026-106803 (opens in a new tab)
- github.com/kamailio/kamailio/issues/4954 (opens in a new tab)
- github.com/kamailio/kamailio/pull/4958 (opens in a new tab)
- github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9 (opens in a new tab)
- gist.github.com/hackeryounow/7d7ccc9ec501a5d8c9143b2e1bcc11cb (opens in a new tab)