TI-2026-31978 Aliases CVE-2026-43915

Coturn: Stored Cross-Site Scripting (XSS) in web-admin interface via TURN username

LOW 24CWE-79Published 2026-06-18 · Updated 2026-06-18

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0024 15th percentileScored 2026-11-07

Fix Fixed coturn (coturn): 4.11.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
coturn	coturn	before 4.11.0	4.11.0	Patch available	CNA

coturn Vendorcoturn Affected before 4.11.0 Fixed in 4.11.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:coturn_project:coturn::::::::	before 4.11.0	Vulnerable	coturn

cpe:2.3:a:coturn_project:coturn:*:*:*:*:*:*:*:* Versions before 4.11.0 Vulnerable ·coturn

Remediation

Fix · CNA coturn (coturn) Fixed in 4.11.0

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-43915

References

Advisory 1

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

Other 1

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

TI-2026-32037 Coturn: Stack buffer overflow in decode_oauth_token_gcm() CVSS 3.1CRITICAL 9.8
TI-2026-29348 Coturn: Misaligned Memory Access in coturn STUN Attribute Parser (Remote DoS on ARM64) CVSS 3.1HIGH 7.5
TI-2026-22006 Coturn: IPv4-mapped IPv6 (::ffff:0:0/96) bypasses denied-peer-ip ACL CVSS 3.1HIGH 7.2
TI-2026-38529 Coturn: SQL Injection in HTTPS Admin Panel Delete Operations CVSS 3.1HIGH 7.2
TI-2026-38531 Coturn: IPv4-mapped 127.0.0.1 bypasses default loopback peer protection CVSS 3.1HIGH 7.4
TI-2026-38530 Coturn: Arbitrary File Write via CLI psd Command CVSS 3.1MEDIUM 6.0

See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences