VDB
CVE-2026-39863
CVE-2026-39863
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 0.05% · 14.9th percentile
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.05%
14.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| kamailio | kamailio | < 5.8.8, >= 6.0.0, < 6.0.6, >= 6.1.0, < 6.1.1 |
Timeline
- Apr 8, 2026 CVE Published
- Apr 9, 2026 CVE Updated
- Apr 11, 2026 EPSS Score
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score