CVE-2026-39863
Last modified
CVE-2026-39863 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. EPSS estimates a 0.46% chance of exploitation in the next 30 days.
Description
Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Kamailio | Kamailio | < 5.8.8 |
| Kamailio | Kamailio | >= 6.0.0, < 6.0.6 |
| Kamailio | Kamailio | 6.1.0 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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