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
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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