CVE-2026-8367
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
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.
Risk Assessment
An attacker could impersonate a trusted server, potentially leading to interception of TLS-transmitted data or man-in-the-middle attacks.
Recommendation
Update aria2 to a version that validates certificate EKU, or configure the client to reject certificates with incorrect EKU.
Other vulnerabilities in aria2
See all- CVE-2026-75421Low risk· EPSS 5%
Stack-buffer-underflow vulnerability in the IOFile::getLine() function in aria2 <=1.37.0.
- CVE-2026-71832Medium
Aria2 version 1.37.0 and below is affected by a Divide By Zero issue in src/bittorrent_helper.cc, which allows a remote malicious user to cause a Denial of Service.
Original NVD description (English source)
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.