CVE-2026-43915

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% 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
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 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. Versions prior to 4.11.0 contain a stored cross-site scripting (XSS) vulnerability in the web-admin HTTPS interface. An attacker who can create a TURN allocation with a crafted USERNAME value can inject HTML/JavaScript that executes when an authenticated web-admin user views the TURN session list. In configurations using anonymous TURN access (--no-auth), this may be exploitable without TURN credentials. In authenticated deployments, exploitation requires valid TURN credentials or control over a provisioned username. This issue has been fixed in version 4.11.0.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
3.9%
KEV
Not listed

Published

June 18, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jun 18, 2026
Patch available. Sources: github_release, github.
github Patch Available

Stored Cross-Site Scripting (XSS) in web-admin interface via TURN username · Advisory · coturn/coturn · GitHub

https://github.com/coturn/coturn/security/advisories/GHSA-xxf5-9vj2-g84j
github_release Patch Available

4.11.0

Patch available: coturn/coturn 4.11.0

https://github.com/coturn/coturn/releases/tag/4.11.0

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 51× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 10:00 UTCEG score recompute
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-14 11:18 UTCEG score recompute
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-13 12:19 UTCEG score recompute
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 13:37 UTCEG score recompute
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-11 14:59 UTCEG score recompute
  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-10 16:20 UTCEG score recompute
  13. 2026-07-09 19:10 UTCEPSS rescore
  14. 2026-07-09 17:36 UTCEG score recompute
  15. 2026-07-08 18:52 UTCEG score recompute
  16. 2026-07-08 15:16 UTCEPSS rescore
  17. 2026-07-07 20:12 UTCEG score recompute
  18. 2026-07-07 13:46 UTCEPSS rescore
  19. 2026-07-06 21:34 UTCEG score recompute
  20. 2026-07-05 22:05 UTCEG score recompute
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-04 23:27 UTCEG score recompute
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-04 00:48 UTCEG score recompute
  25. 2026-07-03 01:55 UTCEG score recompute
Show 26 more
  1. 2026-07-02 03:16 UTCEG score recompute
  2. 2026-07-01 15:07 UTCEPSS rescore
  3. 2026-07-01 04:38 UTCEG score recompute
  4. 2026-06-30 23:22 UTCEPSS rescore
  5. 2026-06-30 05:56 UTCEG score recompute
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-29 07:18 UTCEG score recompute
  8. 2026-06-28 14:07 UTCEPSS rescore
  9. 2026-06-28 08:40 UTCEG score recompute
  10. 2026-06-28 04:56 UTCEPSS rescore
  11. 2026-06-27 10:03 UTCEG score recompute
  12. 2026-06-27 03:08 UTCEPSS rescore
  13. 2026-06-26 11:24 UTCEG score recompute
  14. 2026-06-25 13:49 UTCEPSS rescore
  15. 2026-06-25 13:49 UTCEPSS rescore
  16. 2026-06-25 12:03 UTCEG score recompute
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-24 13:24 UTCEG score recompute
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-23 14:46 UTCEG score recompute
  21. 2026-06-22 16:00 UTCEG score recompute
  22. 2026-06-21 17:21 UTCEG score recompute
  23. 2026-06-20 18:41 UTCEG score recompute
  24. 2026-06-19 20:01 UTCEG score recompute
  25. 2026-06-18 21:22 UTCEG score recompute
  26. 2026-06-18 21:22 UTCNVD updatefirst tracked

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Frequently asked(5)

What is CVE-2026-43915?
CVE-2026-43915 is a medium vulnerability published on June 18, 2026. Coturn is a free open source implementation of TURN and STUN Server. Versions prior to 4.11.0 contain a stored cross-site scripting (XSS) vulnerability in the web-admin HTTPS interface. An attacker who can create a TURN allocation with a crafted USERNAME value can inject HTML/JavaScript that…
When was CVE-2026-43915 disclosed?
CVE-2026-43915 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43915 actively exploited?
CVE-2026-43915 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43915?
CVE-2026-43915 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-43915?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43915, 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.

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