{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e7356f89cf32c130d65b1a0e903fe7ecce426424"
            }
          ],
          "repo": "https://github.com/pyasn1/pyasn1",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-63vm-454h-vhhq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23490.json"
  },
  "details": "pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.",
  "id": "CVE-2026-23490",
  "modified": "2026-04-01T23:08:44.984947181Z",
  "published": "2026-01-16T19:03:36.442Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23490.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23490"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pyasn1 has a DoS vulnerability in decoder"
}