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CVE-2026-53450

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, coturn rejects loopback peers by default unless allow-loopback-peers is enabled, but the default loopback guard can be bypassed by using the IPv4-mapped IPv6 peer address ::ffff:127.0.0.1 in a TURN XOR-PEER-ADDRESS attribute. ioa_addr_is_loopback checks for the literal IPv6 loopback shape before IPv4-mapped IPv6 handling, so good_peer_addr does not apply the default loopback rejection and an authenticated TURN
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:deeee6dc9d69cfd5ce508f2c448104304026c35539c76d4181ff9e1aeb92efed
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"coturn","vendor":"coturn","versions":[{"status":"affected","version":"< 4.13.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c2df8c1b743add8b7b15964f92a11472facb83ea0112c627ff50949366ea9338 · sha256:31e3ec5d54160ce4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c2df8c1b743add8b7b15964f92a11472facb83ea0112c627ff50949366ea9338 · sha256:31e3ec5d54160ce4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c2df8c1b743add8b7b15964f92a11472facb83ea0112c627ff50949366ea9338 · sha256:31e3ec5d54160ce4… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/coturn/coturn/commit/b057acbebe721c8f2f202ddad5e16289e295c754","tags":["x_refsource_MISC"],"url":"https://github.com/coturn/coturn/commit/b057acbebe721c8f2f202ddad5e16289e295c754"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c2df8c1b743add8b7b15964f92a11472facb83ea0112c627ff50949366ea9338 · sha256:31e3ec5d54160ce4… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/coturn/coturn/security/advisories/GHSA-w4hf-cr3w-6h79"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c2df8c1b743add8b7b15964f92a11472facb83ea0112c627ff50949366ea9338 · sha256:31e3ec5d54160ce4… · /containers/adp/0/references/0
{"name":"https://github.com/coturn/coturn/security/advisories/GHSA-w4hf-cr3w-6h79","tags":["x_refsource_CONFIRM"],"url":"https://github.com/coturn/coturn/security/advisories/GHSA-w4hf-cr3w-6h79"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c2df8c1b743add8b7b15964f92a11472facb83ea0112c627ff50949366ea9338 · sha256:31e3ec5d54160ce4… · /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.

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