FKIE_CVE-2026-33750

Vulnerability from fkie_nvd - Published: 2026-03-27 15:16 - Updated: 2026-03-30 13:26
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13, a brace pattern with a zero step value (e.g., `{1..2..0}`) causes the sequence generation loop to run indefinitely, making the process hang for seconds and allocate heaps of memory. Versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13 fix the issue. As a workaround, sanitize strings passed to `expand()` to ensure a step value of `0` is not used.
References
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L107-L113
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L184
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/commit/311ac0d54994158c0a384e286a7d6cbb17ee8ed5
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/commit/7fd684f89fdde3549563d0a6522226a9189472a2
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/commit/b9cacd9e55e7a1fa588fe4b7bb1159d52f1d902a
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/issues/98
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/pull/95
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/pull/96
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/pull/97
security-advisories@github.comhttps://github.com/juliangruber/brace-expansion/security/advisories/GHSA-f886-m6hf-6m8v
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13, a brace pattern with a zero step value (e.g., `{1..2..0}`) causes the sequence generation loop to run indefinitely, making the process hang for seconds and allocate heaps of memory. Versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13 fix the issue. As a workaround, sanitize strings passed to `expand()` to ensure a step value of `0` is not used."
    }
  ],
  "id": "CVE-2026-33750",
  "lastModified": "2026-03-30T13:26:29.793",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-27T15:16:57.297",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L107-L113"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L184"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/commit/311ac0d54994158c0a384e286a7d6cbb17ee8ed5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/commit/7fd684f89fdde3549563d0a6522226a9189472a2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/commit/b9cacd9e55e7a1fa588fe4b7bb1159d52f1d902a"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/issues/98"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/pull/95"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/pull/96"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/pull/97"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-f886-m6hf-6m8v"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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