FKIE_CVE-2026-40931

Vulnerability from fkie_nvd - Published: 2026-04-21 22:16 - Updated: 2026-04-23 15:49
Severity ?
8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Compressing is a compressing and uncompressing lib for node. Prior to 2.1.1 and 1.10.5, the patch for CVE-2026-24884 relies on a purely logical string validation within the isPathWithinParent utility. This check verifies if a resolved path string starts with the destination directory string but fails to account for the actual filesystem state. By exploiting this "Logical vs. Physical" divergence, an attacker can bypass the security check using a Directory Poisoning technique (pre-existing symbolic links). This vulnerability is fixed in 2.1.1 and 1.10.5.
References
security-advisories@github.comhttps://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5Exploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5Exploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
node-modules compressing *
node-modules compressing *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:node-modules:compressing:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "734A2799-2D6B-48E1-BA28-13633AB1A458",
              "versionEndExcluding": "1.10.5",
              "vulnerable": true
            },
            {
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              "versionEndExcluding": "2.1.1",
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  "cveTags": [],
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      "value": "Compressing is a compressing and uncompressing lib for node. Prior to 2.1.1 and 1.10.5, the patch for CVE-2026-24884 relies on a purely logical string validation within the isPathWithinParent utility. This check verifies if a resolved path string starts with the destination directory string but fails to account for the actual filesystem state. By exploiting this \"Logical vs. Physical\" divergence, an attacker can bypass the security check using a Directory Poisoning technique (pre-existing symbolic links). This vulnerability is fixed in 2.1.1 and 1.10.5."
    }
  ],
  "id": "CVE-2026-40931",
  "lastModified": "2026-04-23T15:49:20.480",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "type": "Secondary"
      },
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2026-04-21T22:16:19.247",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
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        "Mitigation",
        "Vendor Advisory"
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      "url": "https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-59"
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}


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