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DEBIAN-CVE-2026-18446

Type: advisorySource: OSV1 source record

fast-uri before 4.1.2, 3.1.5, and 2.4.4 requires a literal double forward slash to recognize a URI authority, so a reference that uses a backslash based introducer in place of it (backslash backslash, forward slash backslash, or backslash forward slash) is parsed with no authority and folds into the path. Node's native WHATWG URL parser instead treats a backslash as interchangeable with a forward slash for special schemes, so the two parsers extract different hosts from the same input. Applications that use fast-uri to enforce host based policy such as allowlists, SSRF filtering, or redirect validation before passing the same URL into Node's URL or fetch consumers can be steered to an unintended host. Upgrade to fast-uri 4.1.2, 3.1.5, or 2.4.4.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-18446

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-18446

node-ajv

Source reference: /affected/0/package/name

Affected versions
8.12.0~ds+~2.1.1-5

Source reference: /affected/0/versions

8.17.1~ds+~3.0.1+~3.1.0-1

Source reference: /affected/0/versions

8.17.1~ds+~3.0.1+~3.1.0-2

Source reference: /affected/0/versions

8.17.1~ds+~3.0.1+~3.1.0-3

Source reference: /affected/0/versions

8.17.1~ds+~3.0.1+~3.1.0-4

Source reference: /affected/0/versions

8.18.0~ds+~cs6.1.1-1

Source reference: /affected/0/versions

8.18.0~ds+~cs6.1.1-2

Source reference: /affected/0/versions

8.20.0~ds+~cs6.1.3-1

Source reference: /affected/0/versions

8.20.0~ds+~cs7.1.2-1

Source reference: /affected/0/versions

8.20.0~ds+~cs7.1.3-1

Source reference: /affected/0/versions

8.20.0~ds+~cs7.1.3-2

Source reference: /affected/0/versions

8.20.0~ds+~cs7.1.3-3

Source reference: /affected/0/versions

8.20.0~ds+~cs7.1.4-1

Source reference: /affected/0/versions

8.20.0~ds+~cs7.1.5-1

Source reference: /affected/0/versions

8.20.0~ds+~cs7.1.6-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

node-ajv

Source reference: /affected/1/package/name

Affected versions
8.12.0~ds+~2.1.1-5

Source reference: /affected/1/versions

8.17.1~ds+~3.0.1+~3.1.0-1

Source reference: /affected/1/versions

8.17.1~ds+~3.0.1+~3.1.0-2

Source reference: /affected/1/versions

8.17.1~ds+~3.0.1+~3.1.0-3

Source reference: /affected/1/versions

8.17.1~ds+~3.0.1+~3.1.0-4

Source reference: /affected/1/versions

8.18.0~ds+~cs6.1.1-1

Source reference: /affected/1/versions

8.18.0~ds+~cs6.1.1-2

Source reference: /affected/1/versions

8.20.0~ds+~cs6.1.3-1

Source reference: /affected/1/versions

8.20.0~ds+~cs7.1.2-1

Source reference: /affected/1/versions

Fixed versions
8.20.0~ds+~cs7.1.3-1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-ajv",
      "purl": "pkg:deb/debian/node-ajv?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "8.12.0~ds+~2.1.1-5",
      "8.17.1~ds+~3.0.1+~3.1.0-1",
      "8.17.1~ds+~3.0.1+~3.1.0-2",
      "8.17.1~ds+~3.0.1+~3.1.0-3",
      "8.17.1~ds+~3.0.1+~3.1.0-4",
      "8.18.0~ds+~cs6.1.1-1",
      "8.18.0~ds+~cs6.1.1-2",
      "8.20.0~ds+~cs6.1.3-1",
      "8.20.0~ds+~cs7.1.2-1",
      "8.20.0~ds+~cs7.1.3-1",
      "8.20.0~ds+~cs7.1.3-2",
      "8.20.0~ds+~cs7.1.3-3",
      "8.20.0~ds+~cs7.1.4-1",
      "8.20.0~ds+~cs7.1.5-1",
      "8.20.0~ds+~cs7.1.6-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18446.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "8.20.0~ds+~cs7.1.3-1"
          }
        ]
      }
    ],
    "package": {
      "name": "node-ajv",
      "purl": "pkg:deb/debian/node-ajv?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "8.12.0~ds+~2.1.1-5",
      "8.17.1~ds+~3.0.1+~3.1.0-1",
      "8.17.1~ds+~3.0.1+~3.1.0-2",
      "8.17.1~ds+~3.0.1+~3.1.0-3",
      "8.17.1~ds+~3.0.1+~3.1.0-4",
      "8.18.0~ds+~cs6.1.1-1",
      "8.18.0~ds+~cs6.1.1-2",
      "8.20.0~ds+~cs6.1.3-1",
      "8.20.0~ds+~cs7.1.2-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18446.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#55556 · Revision 1
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Publisher date
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