CVE Explorer
CVE-2026-39863
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"kamailio","vendor":"kamailio","versions":[{"status":"affected","version":"< 5.8.8"},{"status":"affected","version":">= 6.0.0, < 6.0.6"},{"status":"affected","version":">= 6.1.0, < 6.1.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:80d1f1bc9d08198d48b6be5aad6f9701bb3194329b68096ee579477df0202490 · sha256:fc319d788e8f74dd… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:80d1f1bc9d08198d48b6be5aad6f9701bb3194329b68096ee579477df0202490 · sha256:fc319d788e8f74dd… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-119","description":"CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:80d1f1bc9d08198d48b6be5aad6f9701bb3194329b68096ee579477df0202490 · sha256:fc319d788e8f74dd… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/kamailio/kamailio/security/advisories/GHSA-2wj4-f825-2h2f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kamailio/kamailio/security/advisories/GHSA-2wj4-f825-2h2f"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80d1f1bc9d08198d48b6be5aad6f9701bb3194329b68096ee579477df0202490 · sha256:fc319d788e8f74dd… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.