What’s Vulnerable › Vulnerabilities

CVE-2026-32630: file-type affected by ZIP Decompression Bomb DoS via [Content_Types].xml entry

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-16 · updated 2026-06-17
• Weakness: CWE-409

Description

file-type detects the file type of a file, stream, or data. From 20.0.0 to 21.3.1, a crafted ZIP file can trigger excessive memory growth during type detection in file-type when using fileTypeFromBuffer(), fileTypeFromBlob(), or fileTypeFromFile(). The ZIP inflate output limit is enforced for stream-based detection, but not for known-size inputs. As a result, a small compressed ZIP can cause file-type to inflate and process a much larger payload while probing ZIP-based formats such as OOXML. This vulnerability is fixed in 21.3.2.

Affected products

• sindresorhus file-type: from 20.0.0 before 21.3.2 — fixed in 21.3.2

How to fix

Upgrade to a fixed version: sindresorhus file-type 21.3.2. Check the vendor advisory for mitigations.

References

• https://github.com/sindresorhus/file-type/commit/399b0f156063f5aeb1c124a7fd61028f3ea7c124
• https://github.com/sindresorhus/file-type/security/advisories/GHSA-j47w-4g3g-c36v
• https://github.com/sindresorhus/file-type/security/advisories/GHSA-j47w-4g3g-c36v

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