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CVE-2026-8367— aria2c Improper Certificate Validation

Quick assessment

Affected
aria2_project aria2c
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.

aria2c是aria2开源的一个轻量级多协议命令行下载工具。 aria2c存在信任管理问题漏洞，该漏洞源于接受具有不正确扩展密钥用途的服务器证书，可能导致攻击者重用为不同目的颁发的证书进行TLS服务器身份验证。

CVSS 4.8 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
aria2_project aria2c ≤ 1.37.0 affected
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I. Basic Information for CVE-2026-8367

Vulnerability Information
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Vulnerability Title
aria2c Improper Certificate Validation
Source: CVE Program / CVE List V5
Vulnerability Description
aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
aria2c 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
aria2c是aria2开源的一个轻量级多协议命令行下载工具。 aria2c存在信任管理问题漏洞，该漏洞源于接受具有不正确扩展密钥用途的服务器证书，可能导致攻击者重用为不同目的颁发的证书进行TLS服务器身份验证。
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
aria2_project aria2c 0 ~ 1.37.0 -

II. Public POCs for CVE-2026-8367

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III. Intelligence Information for CVE-2026-8367

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Vendor Advisories for CVE-2026-8367 (1)

IV. Related Vulnerabilities

Same weakness: CWE-295