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CVE-2026-104074— Coturn 4.10.0 Uninitialized Stack Memory Disclosure via ERROR-CODE

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 4.10.0 存在一个未初始化内存泄露漏洞，允许远程未认证攻击者通过发送不带凭据的 TURN Allocate 请求，泄露栈内存内容。攻击者可利用位于 文件中的 函数，该函数在计算缓冲区长度（使用 ）之前，未对 缓冲区进行零初始化。此举会导致泄露的栈字节被复制到 ERROR-CODE 的 Reason Phrase 中，暴露指针片段，从而削弱 ASLR（地址空间布局随机化）的安全性，并使得攻击者能够实现精确的版本指纹识别。

CVSS 5.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
coturn coturn 4.10.0< 4.11.0 affected
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I. Basic Information for CVE-2026-104074

Vulnerability Information
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Vulnerability Title
Coturn 4.10.0 Uninitialized Stack Memory Disclosure via ERROR-CODE
Source: CVE Program / CVE List V5
Vulnerability Description
Coturn 4.10.0 contains an uninitialized memory disclosure vulnerability that allows remote unauthenticated attackers to leak stack memory contents by sending a TURN Allocate request without credentials. Attackers can exploit the stun_init_error_response_common_str() function in src/client/ns_turn_msg.c, which fails to zero-initialize the avalue buffer before computing its length with strlen() and copying leaked stack bytes into the ERROR-CODE reason phrase, exposing pointer fragments that weaken ASLR and enable precise version fingerprinting.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对未经初始化资源的使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
coturn coturn 4.10.0 ~ 4.11.0 -

II. Public POCs for CVE-2026-104074

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III. Intelligence Information for CVE-2026-104074

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Patches & Fixes for CVE-2026-104074 (2)

Vendor Pages for CVE-2026-104074 (1)

IV. Related Vulnerabilities

Same product: coturn
Same vendor: coturn
Same weakness: CWE-908

V. Comments for CVE-2026-104074

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