CVE catalog

CVE-2026-43915

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 wh

[CVE catalog]

Severity
Medium · CVSS 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Published
Source
[NVD] · [CVE record]
EPSS
0.24% · Oct 25, 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 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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debiancoturnsid4.18.0-1fixed
Debiancoturnforky4.18.0-1fixed
Debiancoturntrixie4.6.1-2vulnerable
Debiancoturnbookworm4.6.1-1vulnerable
CpecoturnNot reportedNot reportedvulnerable
CpecoturnNot reported4.11.0fixed
Ubuntucoturn16.044.4.5.4-2vulnerable
Ubuntucoturn16.044.5.0.2-3vulnerable
Ubuntucoturn16.044.5.0.3-1vulnerable
Ubuntucoturn16.044.5.0.3-1build1vulnerable
Ubuntucoturn16.044.5.0.3-1ubuntu0.2vulnerable
Ubuntucoturn16.044.5.0.3-1ubuntu0.3vulnerable
Ubuntucoturn16.044.5.0.3-1ubuntu0.4vulnerable
Ubuntucoturn18.044.5.0.6-1ubuntu2vulnerable
Ubuntucoturn18.044.5.0.7-1ubuntu1vulnerable
Ubuntucoturn18.044.5.0.7-1ubuntu2vulnerable
Ubuntucoturn18.044.5.0.7-1ubuntu2.18.04.1vulnerable
Ubuntucoturn18.044.5.0.7-1ubuntu2.18.04.2vulnerable
Ubuntucoturn18.044.5.0.7-1ubuntu2.18.04.3vulnerable
Ubuntucoturn20.044.5.1.1-1.1build1vulnerable
Ubuntucoturn20.044.5.1.1-1.1build2vulnerable
Ubuntucoturn20.044.5.1.1-1.1ubuntu0.20.04.1vulnerable
Ubuntucoturn20.044.5.1.1-1.1ubuntu0.20.04.2vulnerable
Ubuntucoturn22.044.5.2-3vulnerable
Ubuntucoturn22.044.5.2-3.1~ubuntu22.04.1vulnerable
Ubuntucoturn24.044.6.1-1build1vulnerable
Ubuntucoturn24.044.6.1-1build2vulnerable
Ubuntucoturn24.044.6.1-1build3vulnerable
Ubuntucoturn24.044.6.1-1build4vulnerable
Ubuntucoturn25.104.6.1-2build1vulnerable
Ubuntucoturn26.044.6.1-2build1vulnerable
Ubuntucoturn26.044.6.1-2build2vulnerable

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debiancoturnsourcesid4.12.0-1not yet assignedNot reportedNot reported
Debiancoturnsourceforky4.12.0-1not yet assignedNot reportedNot reported
Debiancoturnsourcetrixie(unfixed)not yet assignedNot reportedNot reported
Debiancoturnsourcebookworm(unfixed)not yet assignedNot reportedNot reported
CpecoturncpeNot reported4.11.0Not reportedNot reportedNot reported

Notes

[trixie] coturn: Minor issue [bookworm] coturn: Minor issue; web-admin stored XSS, is_secure_string()/raw username rendering present in 4.6.1

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [coturn]Affected
    Details (2)

    • 4.6.1-1 · amd64 · bookworm

      Affected

      nvd · coturn · debian · bookworm; nvd · coturn · debian · 12

    • 4.6.1-1 · arm64 · bookworm

      Affected

      nvd · coturn · debian · bookworm; nvd · coturn · debian · 12

[Debian 13 (Trixie)]

  • [coturn]Affected

    Source package: [coturn]

    Details (2)

    • 4.6.1-2 · amd64 · trixie

      Affected

      nvd · coturn · debian · 13

    • 4.6.1-2+b2 · arm64 · trixie

      Affected

      nvd · coturn · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]