mujs — security advisory

{
  "id": "91a65a9733975ebfe157bc7e4d6f7a6396397efdefa9321f2c60c801d8b97869",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-88362",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-88362",
    "summary": "MuJS e892c9fdb contains an incorrect numeric conversion vulnerability in jsR_isindex() in jsrun.c. A specially crafted JavaScript input containing an excessively large numeric array index can cause an out-of-range floating-point value to be converted to an integer without proper range validation. This results in undefined behavior and can cause process termination, leading to denial of service.",
    "evidence": "osv:UBUNTU-CVE-2026-88362",
    "products": [
      {
        "name": {
          "value": "mujs",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.1.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.1.3-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.1.3-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.1.3-3ubuntu0.1~esm1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "mujs",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.3.3-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.3-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.3-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.3-3build1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.3-3build2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "mujs",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.3.8-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.3.9-1",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "mujs",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.3.6-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.3.8-2",
            "evidence": "/affected/3/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-88362",
      "aliases": [
        "UBUNTU-CVE-2026-88362"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "mujs",
            "purl": "pkg:deb/ubuntu/mujs?arch=source&distro=esm-apps%2Fjammy",
            "ecosystem": "Ubuntu:Pro:22.04:LTS"
          },
          "versions": [
            "1.1.0-1",
            "1.1.3-2",
            "1.1.3-3",
            "1.1.3-3ubuntu0.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88362.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libmujs1",
                "binary_version": "1.1.3-3ubuntu0.1~esm1"
              },
              {
                "binary_name": "mujs",
                "binary_version": "1.1.3-3ubuntu0.1~esm1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "mujs",
            "purl": "pkg:deb/ubuntu/mujs?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "1.3.3-1",
            "1.3.3-2",
            "1.3.3-3",
            "1.3.3-3build1",
            "1.3.3-3build2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88362.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libmujs3",
                "binary_version": "1.3.3-3build2"
              },
              {
                "binary_name": "mujs",
                "binary_version": "1.3.3-3build2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "mujs",
            "purl": "pkg:deb/ubuntu/mujs?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "1.3.8-2",
            "1.3.9-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88362.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libmujs3",
                "binary_version": "1.3.9-1"
              },
              {
                "binary_name": "mujs",
                "binary_version": "1.3.9-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "mujs",
            "purl": "pkg:deb/ubuntu/mujs?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "1.3.6-1",
            "1.3.8-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88362.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libmujs3",
                "binary_version": "1.3.8-2"
              },
              {
                "binary_name": "mujs",
                "binary_version": "1.3.8-2"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T13:01:15.682439778Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-88362"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-88362",
        "https://www.cve.org/CVERecord?id=CVE-2026-88362"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-88362",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 361409,
  "published_at": "2026-09-24T16:17:00+00:00"
}