CVE-2026-68555

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Source
https://cve.org/CVERecord?id=CVE-2026-68555
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68555.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-68555
Aliases
  • GHSA-hpq3-g7x4-h7xx
Downstream
Published
2026-08-19T20:43:11.038Z
Modified
2026-08-24T03:59:13.760566Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
coturn: Chained mobility resumes allow authenticated remote memory exhaustion
Details

Coturn is a free open source implementation of TURN and STUN Server. In 4.15.0, an authenticated TURN user can repeatedly resume one allocation from fresh UDP 5-tuples without completing a handoff when the server enables --mobility. mobilebegintransition() in src/server/nsturnserver.c disarms each new session's allocation timeout and overwrites the allocation's single mobilependingresume link, leaving earlier pending sessions unreachable by the cleanup path, while copyauthparameters() ignores inc_quota() failure. The attacker can therefore retain unbounded server-side sessions and exhaust process memory even when --user-quota=1 is configured. This issue is fixed in version 4.16.0.

Database specific 
{
    "cwe_ids": [
        "CWE-400"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68555.json"
}
References

Affected packages

Git / github.com/coturn/coturn

Affected ranges

Type
GIT
Repo
https://github.com/coturn/coturn
Events
Introduced
ac6a9633b16a1a35ab248570484e52d138515ad5
Fixed
a97f1924bb435bec49d6d91ae01fa2487c2e1bf7
Fixed
ef409b4227ca16bdd23b3e3eba38530292c20773
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "4.15.0"
        },
        {
            "fixed": "4.16.0"
        }
    ]
}

Affected versions

4.*
4.15.0
docker/4.*
docker/4.15.0-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68555.json"
vanir_signatures 
[
    {
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
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            ]
        },
        "target": {
            "file": "src/server/ns_turn_server.c"
        },
        "source": "https://github.com/coturn/coturn/commit/a97f1924bb435bec49d6d91ae01fa2487c2e1bf7",
        "signature_version": "v1",
        "id": "CVE-2026-68555-52fa5aa2",
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "47953877983520181555019076378548857990",
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        },
        "target": {
            "function": "mobile_abort_transition",
            "file": "src/server/ns_turn_server.c"
        },
        "source": "https://github.com/coturn/coturn/commit/a97f1924bb435bec49d6d91ae01fa2487c2e1bf7",
        "signature_version": "v1",
        "id": "CVE-2026-68555-5a9e0f6f",
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "150457537054678013249195234482315103309",
            "length": 547.0
        },
        "target": {
            "function": "mobile_begin_transition",
            "file": "src/server/ns_turn_server.c"
        },
        "source": "https://github.com/coturn/coturn/commit/a97f1924bb435bec49d6d91ae01fa2487c2e1bf7",
        "signature_version": "v1",
        "id": "CVE-2026-68555-90fbf7f1",
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "213723254600753328997983386595947787597",
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        },
        "target": {
            "function": "mobile_complete_transition",
            "file": "src/server/ns_turn_server.c"
        },
        "source": "https://github.com/coturn/coturn/commit/a97f1924bb435bec49d6d91ae01fa2487c2e1bf7",
        "signature_version": "v1",
        "id": "CVE-2026-68555-f14081fa",
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-08-24T03:59:13Z"