CVE-2026-8367: CWE-295 Improper certificate validation in aria2_project aria2c
CVE-2026-8367 is a medium severity vulnerability in aria2c where the client accepts server certificates with incorrect Extended Key Usage (EKU). This improper certificate validation could allow an attacker who has compromised a certificate issued for a different purpose to reuse it for TLS server authentication. The vulnerability has a CVSS score of 4.8, indicating limited impact on confidentiality and integrity with no impact on availability. There is no information about an available patch or official remediation at this time.
AI Analysis
Technical Summary
aria2c improperly validates TLS server certificates by accepting certificates with incorrect Extended Key Usage (CWE-295). This means that if an attacker compromises a certificate and its private key that was issued for a purpose other than TLS server authentication, they might reuse it to impersonate a legitimate TLS server to aria2c clients. The vulnerability is rated medium severity with a CVSS 3.1 base score of 4.8 (AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N). No patch or vendor remediation details are currently available.
Potential Impact
An attacker who has access to a compromised certificate and private key intended for a different use could potentially impersonate a TLS server to aria2c clients. This could lead to limited confidentiality and integrity impacts during TLS connections. There is no known exploitation in the wild and no impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should be cautious when connecting to untrusted servers and consider additional TLS validation measures outside aria2c if possible.
CVE-2026-8367: CWE-295 Improper certificate validation in aria2_project aria2c
Description
CVE-2026-8367 is a medium severity vulnerability in aria2c where the client accepts server certificates with incorrect Extended Key Usage (EKU). This improper certificate validation could allow an attacker who has compromised a certificate issued for a different purpose to reuse it for TLS server authentication. The vulnerability has a CVSS score of 4.8, indicating limited impact on confidentiality and integrity with no impact on availability. There is no information about an available patch or official remediation at this time.
CVSS v3.1
Score 4.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
aria2c improperly validates TLS server certificates by accepting certificates with incorrect Extended Key Usage (CWE-295). This means that if an attacker compromises a certificate and its private key that was issued for a purpose other than TLS server authentication, they might reuse it to impersonate a legitimate TLS server to aria2c clients. The vulnerability is rated medium severity with a CVSS 3.1 base score of 4.8 (AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N). No patch or vendor remediation details are currently available.
Potential Impact
An attacker who has access to a compromised certificate and private key intended for a different use could potentially impersonate a TLS server to aria2c clients. This could lead to limited confidentiality and integrity impacts during TLS connections. There is no known exploitation in the wild and no impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should be cautious when connecting to untrusted servers and consider additional TLS validation measures outside aria2c if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- tenable
- Date Reserved
- 2026-05-11T20:46:54.600Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a049726cbff5d8610e01004
Added to database: 05/13/2026, 15:22:14 UTC
Last enriched: 05/20/2026, 19:11:10 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 114
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