CVE-2026-8367

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 13, 2026

Last Modified

August 19, 2026

Advisory Details (1)

Auto-updated Jun 16, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

aria2c Improper Certificate Validation - Research Advisory | Tenable®

https://www.tenable.com/security/research/tra-2026-38

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
aria21.35.0-3, 1.36.0-1, 1.36.0-2——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
aria21.36.0-1, 1.36.0-2——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
aria20.10.1-1 ... 1.9.5-1 (85 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
aria20.10.1-1 ... 1.9.5-1 (85 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 168 total refreshes for this CVE.

  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-13 16:48 UTCEPSS rescore
  3. 2026-09-12 15:02 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 09:23 UTCOSV refresh
  6. 2026-09-08 22:01 UTCEPSS rescore
  7. 2026-09-06 13:48 UTCEPSS rescore
  8. 2026-09-05 15:31 UTCEPSS rescore
  9. 2026-09-04 05:07 UTCEPSS rescore
  10. 2026-09-02 14:12 UTCEPSS rescore
  11. 2026-09-01 13:54 UTCEPSS rescore
  12. 2026-09-01 04:40 UTCEPSS rescore
  13. 2026-08-30 19:18 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:42 UTCEPSS rescore
  16. 2026-08-27 14:25 UTCEPSS rescore
  17. 2026-08-26 14:47 UTCEPSS rescore
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-24 14:18 UTCEPSS rescore
  20. 2026-08-23 17:52 UTCEG score recompute
  21. 2026-08-23 17:52 UTCGHSA enrichment
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-20 22:56 UTCEPSS rescore
  25. 2026-08-20 20:58 UTCEG score recompute
Show 75 more
  1. 2026-08-20 20:57 UTCGHSA enrichment
  2. 2026-08-19 17:04 UTCEPSS rescore
  3. 2026-08-19 12:49 UTCEG score recompute▲ 0.50
  4. 2026-08-19 12:49 UTCGHSA enrichment
  5. 2026-08-19 12:48 UTCNVD updateCVSS v3 → 5.3
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 10:40 UTCEG score recompute
  8. 2026-08-17 10:40 UTCGHSA enrichment
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 04:04 UTCEG score recompute
  12. 2026-08-16 04:04 UTCGHSA enrichment
  13. 2026-08-16 02:15 UTCEPSS rescore
  14. 2026-08-15 01:31 UTCEPSS rescore
  15. 2026-08-15 01:10 UTCGHSA enrichment
  16. 2026-08-14 02:32 UTCEG score recompute
  17. 2026-08-14 02:32 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-12 22:12 UTCGHSA enrichment
  20. 2026-08-11 23:34 UTCEG score recompute
  21. 2026-08-11 23:34 UTCGHSA enrichment
  22. 2026-08-11 13:43 UTCEPSS rescore
  23. 2026-08-11 00:57 UTCEG score recompute
  24. 2026-08-11 00:57 UTCGHSA enrichment
  25. 2026-08-11 00:00 UTCEPSS rescore
  26. 2026-08-10 00:33 UTCEG score recompute
  27. 2026-08-10 00:33 UTCGHSA enrichment
  28. 2026-08-09 13:47 UTCEPSS rescore
  29. 2026-08-09 01:55 UTCEG score recompute
  30. 2026-08-09 01:55 UTCGHSA enrichment
  31. 2026-08-08 16:37 UTCEPSS rescore
  32. 2026-08-07 18:57 UTCEG score recompute
  33. 2026-08-07 18:57 UTCGHSA enrichment
  34. 2026-08-06 20:19 UTCEG score recompute
  35. 2026-08-06 20:19 UTCGHSA enrichment
  36. 2026-08-06 13:47 UTCEPSS rescore
  37. 2026-08-05 21:41 UTCEG score recompute
  38. 2026-08-05 21:41 UTCGHSA enrichment
  39. 2026-08-05 19:17 UTCEPSS rescore
  40. 2026-08-05 19:17 UTCEPSS rescore
  41. 2026-08-04 15:10 UTCEPSS rescore
  42. 2026-08-04 10:39 UTCEPSS rescore
  43. 2026-08-03 19:09 UTCEG score recompute
  44. 2026-08-03 19:09 UTCGHSA enrichment
  45. 2026-08-03 10:36 UTCEPSS rescore
  46. 2026-08-02 18:34 UTCEG score recompute
  47. 2026-08-02 18:34 UTCGHSA enrichment
  48. 2026-08-02 02:27 UTCEPSS rescore
  49. 2026-08-01 19:56 UTCEG score recompute
  50. 2026-08-01 19:56 UTCGHSA enrichment
  51. 2026-08-01 04:16 UTCEPSS rescore
  52. 2026-07-30 16:28 UTCEPSS rescore
  53. 2026-07-28 15:37 UTCEPSS rescore
  54. 2026-07-25 14:18 UTCEPSS rescore
  55. 2026-07-24 14:18 UTCEPSS rescore
  56. 2026-07-23 14:18 UTCEPSS rescore
  57. 2026-07-23 03:23 UTCEG score recompute
  58. 2026-07-22 14:08 UTCEPSS rescore
  59. 2026-07-21 15:25 UTCEPSS rescore
  60. 2026-07-21 15:25 UTCEPSS rescore
  61. 2026-07-20 17:08 UTCEPSS rescore
  62. 2026-07-19 14:31 UTCEPSS rescore
  63. 2026-07-18 10:04 UTCEPSS rescore
  64. 2026-07-16 17:03 UTCEPSS rescore
  65. 2026-07-15 16:57 UTCEPSS rescore
  66. 2026-07-15 02:00 UTCEPSS rescore
  67. 2026-07-13 22:31 UTCEPSS rescore
  68. 2026-07-13 06:13 UTCEPSS rescore
  69. 2026-07-09 19:10 UTCEPSS rescore
  70. 2026-07-08 15:16 UTCEPSS rescore
  71. 2026-07-08 15:16 UTCEPSS rescore
  72. 2026-07-07 13:46 UTCEPSS rescore
  73. 2026-07-07 13:46 UTCEPSS rescore
  74. 2026-07-06 02:23 UTCEPSS rescore
  75. 2026-07-06 02:23 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8367?
CVE-2026-8367 is a medium vulnerability published on May 13, 2026. 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.
When was CVE-2026-8367 disclosed?
CVE-2026-8367 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8367 actively exploited?
CVE-2026-8367 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.3% of all scored CVEs.
What is the CVSS score of CVE-2026-8367?
CVE-2026-8367 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-8367?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8367, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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