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CVE-2026-40931

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 symbol
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:39e8b709dfd1d8a59db3b6aeab67a02c3d51504a50a4b2975489318f9950cb6d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"compressing","vendor":"node-modules","versions":[{"status":"affected","version":">=2.0.0, < 2.1.1"},{"status":"affected","version":"< 1.10.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d99d4c49a0854904a152687037bcf27f3e1f2932f12cf4ffd2e212fa1afa8aef · sha256:f1efaa4fa8b64565… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d99d4c49a0854904a152687037bcf27f3e1f2932f12cf4ffd2e212fa1afa8aef · sha256:f1efaa4fa8b64565… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d99d4c49a0854904a152687037bcf27f3e1f2932f12cf4ffd2e212fa1afa8aef · sha256:f1efaa4fa8b64565… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d99d4c49a0854904a152687037bcf27f3e1f2932f12cf4ffd2e212fa1afa8aef · sha256:f1efaa4fa8b64565… · /containers/adp/0/references/0
{"name":"https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d99d4c49a0854904a152687037bcf27f3e1f2932f12cf4ffd2e212fa1afa8aef · sha256:f1efaa4fa8b64565… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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