PT-2026-24463 · File-Type · File-Type

Crnkovic · Published 2026-03-10 · Updated 2026-05-22 · CVE-2026-31808

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions file-type versions prior to 21.3.1

Description A denial of service issue exists in the ASF (WMV/WMA) file type detection parser within file-type. When processing a specially crafted input where an ASF sub-header has a size field of zero, the parser gets stuck in an infinite loop. The payload value becomes negative (-24), causing tokenizer.ignore(payload) to move the read position backwards, repeatedly reading the same sub-header. Applications utilizing file-type to detect the type of untrusted input are susceptible. An attacker can disrupt the Node.js event loop with a 55-byte payload.

Recommendations Update to version 21.3.1 or later.

Exploit

Fix

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2026-31808

GHSA-5V7R-6R5C-R473

Affected Products

File-Type

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31808.json · Exploit
• https://github.com/sindresorhus/file-type/commit/319abf871b50ba2fa221b4a7050059f1ae096f4f · Patch
• https://github.com/sindresorhus/file-type/security/advisories/GHSA-5v7r-6r5c-r473 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-31808 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-NPM-CVE-2026-31808 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-5v7r-6r5c-r473 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31808 · Security Note
• https://github.com/sindresorhus/file-type · Note
• https://twitter.com/CVEnew/status/2031504087364059571 · Twitter Post