CVE-2026-73212

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 80% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, good_peer_addr() in src/server/ns_turn_server.c uses ioa_addr_in_range() in src/client/ns_turn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC 6062 TCP CONNECT relay client to bypass an IPv4 denied-peer-ip range when the Coturn host has a useful translation route. This issue is fixed in version 4.13.1.

CVSS v3
5.8
EG Score
5.8(medium)
EG Risk
26(Track)
EG Risk 26/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity58% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 11, 2026

Advisory Details (6)

Auto-updated Aug 11, 2026
Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available

coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE · Advisory · coturn/coturn · GitHub

https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4
github_release Patch Available

4.13.1

Patch available: coturn/coturn 4.13.1

https://github.com/coturn/coturn/releases/tag/4.13.1
github_pr Patch Available

Deny link-local / ULA / site-local relay peers by default

Patch available: coturn/coturn 4.13.1 (PR #1947 merged 2026-06-15)

https://github.com/coturn/coturn/pull/1947
github_pr Patch Available

Canonicalize all IPv4-in-IPv6 encodings before peer-IP checks

Patch available: coturn/coturn 4.13.1 (PR #1945 merged 2026-06-15)

https://github.com/coturn/coturn/pull/1945
github_commit Patch Available

commit d49ee56aa9fe (coturn/coturn)

Patch available: coturn/coturn 4.13.1 (contains commit d49ee56aa9fe)

https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbc
github_commit Patch Available

commit cf4b4952de48 (coturn/coturn)

Patch available: coturn/coturn 4.13.1 (contains commit cf4b4952de48)

https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfdda

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 08:09 UTCEG score recompute
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-29 09:08 UTCEG score recompute
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 01:39 UTCEG score recompute
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-27 02:39 UTCEG score recompute
  8. 2026-08-26 14:47 UTCEPSS rescore
  9. 2026-08-26 03:39 UTCEG score recompute
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-25 04:40 UTCEG score recompute
  12. 2026-08-23 06:40 UTCEG score recompute
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-22 07:41 UTCEG score recompute
  15. 2026-08-21 23:49 UTCEPSS rescore
  16. 2026-08-21 08:41 UTCEG score recompute
  17. 2026-08-20 22:56 UTCEPSS rescore
  18. 2026-08-20 09:41 UTCEG score recompute
  19. 2026-08-19 17:04 UTCEPSS rescore
  20. 2026-08-19 10:42 UTCEG score recompute
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 11:38 UTCEG score recompute
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-17 12:39 UTCEG score recompute
Show 14 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-16 13:39 UTCEG score recompute
  4. 2026-08-16 02:15 UTCEPSS rescore
  5. 2026-08-15 14:39 UTCEG score recompute
  6. 2026-08-15 01:31 UTCEPSS rescore
  7. 2026-08-14 15:38 UTCEG score recompute
  8. 2026-08-13 22:00 UTCEPSS rescore
  9. 2026-08-12 17:36 UTCEG score recompute
  10. 2026-08-12 13:51 UTCEPSS rescore
  11. 2026-08-11 18:37 UTCEG score recompute
  12. 2026-08-11 18:06 UTCEG score recompute
  13. 2026-08-11 17:37 UTCEG score recompute
  14. 2026-08-11 17:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73212?
CVE-2026-73212 is a medium vulnerability published on August 11, 2026. Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, goodpeeraddr() in src/server/nsturnserver.c uses ioaaddrinrange() in src/client/nsturn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC…
When was CVE-2026-73212 disclosed?
CVE-2026-73212 was first published in the National Vulnerability Database on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73212 actively exploited?
CVE-2026-73212 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.7% of all scored CVEs.
What is the CVSS score of CVE-2026-73212?
CVE-2026-73212 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-73212?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73212, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-73212

Explore →

Is Your Infrastructure Affected by CVE-2026-73212?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs