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m17n-lib — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-107168

A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.

Products
m17n-lib
Affected versions
1.6.4-3, 1.7.0-1, 1.7.0-2, 1.7.0-3, 1.7.0-3build1, 1.8.0-2, 1.8.0-2build1, 1.8.0-3, 1.8.0-3.1, 1.8.0-3build1, 1.8.0-4, 1.8.4-1, 1.8.4-1build1, 1.8.4-1build2, 1.8.5-1build1, 1.8.6-1
Fixed versions
Not specified
CVEs
CVE-2026-107168
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 01:58 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-107168

core-osv · Original source

Published 7 Oct 2026, 13:17 UTC

A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.

osv:UBUNTU-CVE-2026-107168

m17n-lib

Fixed versions: Not specified

m17n-lib

Fixed versions: Not specified

m17n-lib

Fixed versions: Not specified

m17n-lib

Fixed versions: Not specified

m17n-lib

Fixed versions: Not specified

m17n-lib

Fixed versions: Not specified

m17n-lib

Fixed versions: Not specified

Complete source record
{
  "id": "decec9963db5c3eff67f48e7372a823c3b3ce23c6c757d7f02b98cb35ae145af",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-107168",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-107168",
    "summary": "A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.",
    "evidence": "osv:UBUNTU-CVE-2026-107168",
    "products": [
      {
        "name": {
          "value": "m17n-lib",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.6.4-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.7.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.7.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.7.0-3",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "m17n-lib",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.7.0-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.7.0-3build1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "m17n-lib",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.8.0-2",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "m17n-lib",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.8.0-2build1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.8.0-3",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.8.0-3build1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.8.0-3.1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.8.0-4",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "m17n-lib",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.8.4-1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.8.4-1build1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.8.4-1build2",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "m17n-lib",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.8.6-1",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "m17n-lib",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.8.5-1build1",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "1.8.6-1",
            "evidence": "/affected/6/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-107168",
      "aliases": [
        "UBUNTU-CVE-2026-107168"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/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": "m17n-lib",
            "purl": "pkg:deb/ubuntu/m17n-lib?arch=source&distro=xenial",
            "ecosystem": "Ubuntu:16.04:LTS"
          },
          "versions": [
            "1.6.4-3",
            "1.7.0-1",
            "1.7.0-2",
            "1.7.0-3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107168.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libm17n-0",
                "binary_version": "1.7.0-3"
              },
              {
                "binary_name": "m17n-lib-bin",
                "binary_version": "1.7.0-3"
              },
              {
                "binary_name": "m17n-lib-mimx",
                "binary_version": "1.7.0-3"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "m17n-lib",
            "purl": "pkg:deb/ubuntu/m17n-lib?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
          },
          "versions": [
            "1.7.0-3",
            "1.7.0-3build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107168.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libm17n-0",
                "binary_version": "1.7.0-3build1"
              },
              {
                "binary_name": "m17n-lib-bin",
                "binary_version": "1.7.0-3build1"
              },
              {
                "binary_name": "m17n-lib-mimx",
                "binary_version": "1.7.0-3build1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "m17n-lib",
            "purl": "pkg:deb/ubuntu/m17n-lib?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "1.8.0-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107168.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libm17n-0",
                "binary_version": "1.8.0-2"
              },
              {
                "binary_name": "m17n-lib-bin",
                "binary_version": "1.8.0-2"
              },
              {
                "binary_name": "m17n-lib-mimx",
                "binary_version": "1.8.0-2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "m17n-lib",
            "purl": "pkg:deb/ubuntu/m17n-lib?arch=source&distro=jammy",
            "ecosystem": "Ubuntu:22.04:LTS"
          },
          "versions": [
            "1.8.0-2build1",
            "1.8.0-3",
            "1.8.0-3build1",
            "1.8.0-3.1",
            "1.8.0-4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107168.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libm17n-0",
                "binary_version": "1.8.0-4"
              },
              {
                "binary_name": "m17n-lib-bin",
                "binary_version": "1.8.0-4"
              },
              {
                "binary_name": "m17n-lib-mimx",
                "binary_version": "1.8.0-4"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "m17n-lib",
            "purl": "pkg:deb/ubuntu/m17n-lib?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "1.8.4-1",
            "1.8.4-1build1",
            "1.8.4-1build2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107168.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libm17n-0",
                "binary_version": "1.8.4-1build2"
              },
              {
                "binary_name": "m17n-lib-bin",
                "binary_version": "1.8.4-1build2"
              },
              {
                "binary_name": "m17n-lib-mimx",
                "binary_version": "1.8.4-1build2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
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                }
              ]
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          ],
          "package": {
            "name": "m17n-lib",
            "purl": "pkg:deb/ubuntu/m17n-lib?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "1.8.6-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107168.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libm17n-0",
                "binary_version": "1.8.6-1"
              },
              {
                "binary_name": "m17n-lib-bin",
                "binary_version": "1.8.6-1"
              },
              {
                "binary_name": "m17n-lib-mimx",
                "binary_version": "1.8.6-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "m17n-lib",
            "purl": "pkg:deb/ubuntu/m17n-lib?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "1.8.5-1build1",
            "1.8.6-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107168.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libm17n-0",
                "binary_version": "1.8.6-1"
              },
              {
                "binary_name": "m17n-lib-bin",
                "binary_version": "1.8.6-1"
              },
              {
                "binary_name": "m17n-lib-mimx",
                "binary_version": "1.8.6-1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:58:00.937240317Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-107168"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-107168",
        "https://www.cve.org/CVERecord?id=CVE-2026-107168",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2547409",
        "https://access.redhat.com/security/cve/CVE-2026-107168"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-107168",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 357865,
  "published_at": "2026-10-07T13:17:00+00:00"
}