Bug 2490558 (CVE-2026-43915)

Summary: CVE-2026-43915 coturn: Coturn: Cross-Site Scripting (XSS) via crafted username in TURN allocation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in Coturn. A remote attacker can exploit a stored Cross-Site Scripting (XSS) vulnerability in the web-admin HTTPS interface by creating a TURN allocation with a crafted username. This allows the attacker to inject malicious HTML or JavaScript code. When an authenticated web-admin user views the TURN session list, the injected code executes, potentially leading to information disclosure or unauthorized actions within the web-admin interface.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2490809, 2490810    
Bug Blocks:    

Description OSIDB Bzimport 2026-06-18 20:01:27 UTC
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.