CVE catalog
CVE-2026-73214
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, dtls_server_input_handler() and create_new_connected_udp_socket() in src/apps/relay/dtls_listener.c retain OpenSSL
- Severity
- High · CVSS 8.2
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.58% · Oct 25, 2026
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, dtls_server_input_handler() and create_new_connected_udp_socket() in src/apps/relay/dtls_listener.c retain OpenSSL dtls1_reassemble_fragment() state for a 35-byte fragmented ClientHello declaring a 650,000-byte handshake before cookie validation, allowing an unauthenticated remote sender using fresh UDP tuples to exhaust memory without TURN credentials, a completed handshake, a valid cookie, or source spoofing. This issue is fixed in version 4.16.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | coturn | sid | 4.18.0-1 | fixed |
| Debian | coturn | forky | 4.18.0-1 | fixed |
| Debian | coturn | trixie | 4.6.1-2 | vulnerable |
| Debian | coturn | bookworm | 4.6.1-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | coturn | source | sid | 4.18.0-1 | not yet assigned | Not reported | [1144385] |
| Debian | coturn | source | forky | 4.18.0-1 | not yet assigned | Not reported | [1144385] |
| Debian | coturn | source | trixie | (unfixed) | not yet assigned | Not reported | [1144385] |
| Debian | coturn | source | bookworm | (unfixed) | not yet assigned | Not reported | [1144385] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [coturn]Affected
Details (2)
4.6.1-1· amd64 · bookwormAffected
nvd · coturn · debian · bookworm; nvd · coturn · debian · 12
4.6.1-1· arm64 · bookwormAffected
nvd · coturn · debian · bookworm; nvd · coturn · debian · 12
[Debian 13 (Trixie)]
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11617-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-73214]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-73214]
- [https://security-tracker.debian.org/tracker/CVE-2026-73214]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73214.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]