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CVE-2026-53449— Coturn: Arbitrary File Write via CLI psd Command

Quick assessment

Affected
coturn coturn
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Coturn是Coturn组织开源的一款TURN(VoIP媒体业务NAT穿越服务器和网关)和STUN(用户数据报协议简单穿越网络地址转换器)Server的开源实现。 Coturn 4.13.0之前版本存在输入验证错误漏洞，该漏洞源于psd print sessions dump CLI命令对路径未进行验证，可能导致经过身份验证的管理员通过CLI访问覆盖可写文件。

CVSS 6.0 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 1

VendorProduct Version RangeStatus
coturn coturn < 4.13.0 affected
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I. Basic Information for CVE-2026-53449

Vulnerability Information
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Vulnerability Title
Coturn: Arbitrary File Write via CLI psd Command
Source: CVE Program / CVE List V5
Vulnerability Description
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, the psd print sessions dump CLI command in coturn takes a filename argument and directly passes it to fopen with no path validation. An authenticated admin with CLI access can overwrite arbitrary files writable by the coturn process because the command string is used as-is after stripping the psd prefix and leading spaces, allowing truncation and overwrite with session dump data. This issue is fixed in version 4.13.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
Coturn 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Coturn是Coturn组织开源的一款TURN(VoIP媒体业务NAT穿越服务器和网关)和STUN(用户数据报协议简单穿越网络地址转换器)Server的开源实现。 Coturn 4.13.0之前版本存在输入验证错误漏洞，该漏洞源于psd print sessions dump CLI命令对路径未进行验证，可能导致经过身份验证的管理员通过CLI访问覆盖可写文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
coturn coturn < 4.13.0 -

II. Public POCs for CVE-2026-53449

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III. Intelligence Information for CVE-2026-53449

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Patches & Fixes for CVE-2026-53449 (1)

Vendor Advisories for CVE-2026-53449 (1)

Vendor Pages for CVE-2026-53449 (1)

Same Patch Batch · coturn · 2026-07-10 · 3 CVEs total

CVE-2026-53450 7.4 HIGH Coturn: IPv4-mapped 127.0.0.1 bypasses default loopback peer protection
CVE-2026-53448 7.2 HIGH Coturn: SQL Injection in HTTPS Admin Panel Delete Operations

IV. Related Vulnerabilities

Same product: coturn
Same vendor: coturn
Same weakness: CWE-73