aria2c Improper Certificate Validation
Published May 13, 2026
5.3
MEDIUMCVSS 3.1
EPSS 0.19%
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.
Affected products
-
- Version 0StatusaffectedConstraints<=1.37.0
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Aria2 Project | Aria2c | unaffected |
|
- < 1.37.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 13, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.19% (0.00186) | 7.43th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.11% (0.00110) | 1.52th | v5 (v2026.06.15) |
| May 14, 2026 | 0.02% (0.00018) | 4.66th | v4 (v2025.03.14) |
References (1)
- https://www.tenable.com/security/research/tra-2026-38 ExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.tenable.com/security/research/tra-2026-38 | ExploitThird Party Advisory |
Change history (0)
No recorded changes yet.