CVE-2026-68552

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Source
https://cve.org/CVERecord?id=CVE-2026-68552
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68552.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-68552
Aliases
  • GHSA-m562-mf7x-q7rr
Downstream
Related
Published
2026-08-19T20:39:14.822Z
Modified
2026-08-28T18:25:57.011675882Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
Coturn: uint16_t truncation overflow in STUN message length causes TCP stream framing bypass
Details

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, an unauthenticated remote client can send a STUN message over TCP or TLS with a body-length field from 65520 through 65532, causing the uint16t len variable in stungetmessagelenstr() in src/client/nsturnmsg.c to wrap when STUNHEADER_LENGTH is added. The framing layer then consumes only 4 through 16 bytes, treats the remaining bytes as another message, desynchronizes the stream parser, and drops the attacking client's connection. Other clients and the server process are not affected. This issue is fixed in version 4.15.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68552.json"
}
References

Affected packages

Git / github.com/coturn/coturn

Affected ranges

Type
GIT
Repo
https://github.com/coturn/coturn
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ed32e1fb6c843f9cf9a28d91c541dfbf40874f25
Fixed
ac6a9633b16a1a35ab248570484e52d138515ad5
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.15.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

4.*
4.10.0
4.11.0
4.12.0
4.13.0
4.13.1
4.14.0
4.4.5.3
4.4.5.4
4.5.0.1
4.5.0.2
4.5.0.3
4.5.0.4
4.5.0.5
4.5.0.6
4.5.0.7
4.5.1.0
4.5.1.1
4.5.1.2
4.5.1.3
4.5.2
4.6.0
4.6.2
4.6.3
4.7.0
4.8.0
4.9.0
docker/4.*
docker/4.10.0-r0
docker/4.10.0-r1
docker/4.11.0-r0
docker/4.12.0-r0
docker/4.13.0-r0
docker/4.13.1-r0
docker/4.14.0-r0
docker/4.5.2-r0
docker/4.5.2-r10
docker/4.5.2-r11
docker/4.5.2-r12
docker/4.5.2-r13
docker/4.5.2-r14
docker/4.5.2-r6
docker/4.5.2-r7
docker/4.5.2-r8
docker/4.5.2-r9
docker/4.6.0-r0
docker/4.6.0-r1
docker/4.6.1-r0
docker/4.6.1-r1
docker/4.6.1-r2
docker/4.6.1-r3
docker/4.6.2-r0
docker/4.6.2-r1
docker/4.6.2-r10
docker/4.6.2-r11
docker/4.6.2-r12
docker/4.6.2-r13
docker/4.6.2-r2
docker/4.6.2-r3
docker/4.6.2-r4
docker/4.6.2-r5
docker/4.6.2-r6
docker/4.6.2-r7
docker/4.6.2-r8
docker/4.6.2-r9
docker/4.6.3-r0
docker/4.6.3-r1
docker/4.6.3-r2
docker/4.6.3-r3
docker/4.7.0-r0
docker/4.7.0-r1
docker/4.7.0-r2
docker/4.7.0-r3
docker/4.7.0-r4
docker/4.8.0-r0
docker/4.8.0-r1
docker/4.9.0-r0

Database specific

vanir_signatures_modified 
"2026-08-24T03:59:08Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68552.json"
vanir_signatures 
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        "signature_type": "Function",
        "source": "https://github.com/coturn/coturn/commit/ed32e1fb6c843f9cf9a28d91c541dfbf40874f25",
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        "signature_type": "Line",
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