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CVE-2026-39245

decompress before 4.2.2 contains an improper path containment check that enables directory traversal and arbitrary file write. The safeMakeDir function (index.js line 29) and the extraction path validation (index.js line 106) use String.indexOf() to verify the resolved path is within the output directory: realDestinationDir.indexOf(realOutputPath) !== 0. This check is flawed because it does not enforce a path separator boundary. For example, "/tmp/app_config".indexOf("/tmp/app") returns 0, incor
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3b54dddc0750ee67c86a5567275f8c87471ec9dfab15531c9d482270194e4888
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

5 source assertions
{"url":"https://github.com/kevva/decompress"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/cna/references/0
{"url":"https://github.com/kevva/decompress/issues/115"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/kevva/decompress/issues/115"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/adp/0/references/0
{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-12265"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/cna/references/2
{"url":"https://www.npmjs.com/package/decompress"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:048aed372146a4be9907b283070dc3a8016303223e12b3325da51b277a6d79bf · sha256:ff1c73460b781e5c… · /containers/cna/references/1

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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