CVE-2026-39246
highpriority · track · 0EPSS 0.007 · 51 %ileEUUSEPSS · scored 2026-10-28
decompress before 4.2.2 allows arbitrary symlink creation during archive extraction. When processing symlink entries (type === 'symlink'), the x.linkname field from the archive is passed directly to fs.symlink() without validation (index.js line 121). The preventWritingThroughSymlink check on line 98 only applies to file entries, not symlink creation. An attacker can craft an archive with symlink entries pointing to sensitive files outside the extraction directory (e.g., /etc/passwd), enabling information disclosure when the application reads the extracted contents.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://github.com/kevva/decompresscnnvd
- https://github.com/kevva/decompress/issues/114cnnvd
- https://www.npmjs.com/package/decompresscnnvd
- https://github.com/kevva/decompressenisa_euvd
- https://github.com/kevva/decompress/issues/114enisa_euvd
- https://www.npmjs.com/package/decompressenisa_euvd
- https://github.com/kevva/decompressProductnvd
- https://github.com/kevva/decompress/issues/114ExploitVendor Advisorynvd
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