ubuntu-cve-2026-8367
Vulnerability from osv_ubuntu
Published
2026-05-13 16:17
Modified
2026-05-13 16:17
Summary
Details

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.

Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.18.1-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.18.1-1ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.17.0-1",
        "1.18.0-1",
        "1.18.0-1ubuntu2",
        "1.18.0-2",
        "1.18.1-1",
        "1.18.1-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.19.0-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.19.0-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.19.0-1",
        "1.19.0-1build1",
        "1.19.0-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.33.1-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.33.1-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.32.0-1",
        "1.32.0-2",
        "1.33.1-1",
        "1.33.1-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.35.0-1build1"
          },
          {
            "binary_name": "libaria2-0",
            "binary_version": "1.35.0-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.35.0-1build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.34.0-4",
        "1.35.0-1",
        "1.35.0-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.36.0-1"
          },
          {
            "binary_name": "libaria2-0",
            "binary_version": "1.36.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.36.0-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.35.0-3",
        "1.36.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.37.0+debian-1build3"
          },
          {
            "binary_name": "libaria2-0",
            "binary_version": "1.37.0+debian-1build3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.37.0+debian-1build3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.36.0-2",
        "1.37.0+debian-1",
        "1.37.0+debian-1build1",
        "1.37.0+debian-1build2",
        "1.37.0+debian-1build3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.37.0+debian-3build1"
          },
          {
            "binary_name": "libaria2-0",
            "binary_version": "1.37.0+debian-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.37.0+debian-3build1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.37.0+debian-3",
        "1.37.0+debian-3build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aria2",
            "binary_version": "1.37.0+debian-4"
          },
          {
            "binary_name": "libaria2-0",
            "binary_version": "1.37.0+debian-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "aria2",
        "purl": "pkg:deb/ubuntu/aria2@1.37.0+debian-4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.37.0+debian-3build1",
        "1.37.0+debian-4"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-8367",
  "modified": "2026-05-13T16:17:00Z",
  "published": "2026-05-13T16:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-8367"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-8367"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/aria2/aria2/issues/2355"
    },
    {
      "type": "REPORT",
      "url": "https://www.tenable.com/security/research/tra-2026-38"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-8367"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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