highCVSS 7.5Vulnerability

CVE-2026-8162

### Impact [email protected] and lower versions are vulnerable to denial of service via uncaught exception. By sending a `multipart/form-data` request with a `Content-Disposition: filename*=utf-8''` header containing a malformed percent-encoding (e.g., `%FF`, `%GG`), the parser invokes `decodeURI` on the value without try/catch. The resulting `URIError` propagates as an uncaught exception and crashes the process. Any service accepting multipart uploads via multiparty is affected. ### Patches Users should upgrade to [email protected] or higher. ### Workarounds None.

Properties

summary
multiparty vulnerable to Denial of Service via Uncaught Exception in filename* parameter parsing
severity
high
epss_score
0.00279
cvss_score
7.5
ghsa_published
2026-05-18T17:35:24Z
source_url
https://github.com/advisories/GHSA-xh3c-6gcq-g4rv
ghsa_updated
2026-05-23T21:35:24Z
ghsa_id
GHSA-xh3c-6gcq-g4rv
cve_id
CVE-2026-8162
cvss_vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
is_ghsa_only
false
epss_percentile
0.20492

Related Entities (5)

ENRICHED_BY (1)

[Source]FIRST EPSS

AFFECTS (1)

[Software]npm/multiparty

HAS_WEAKNESS (1)

[Weakness]Improper Handling of Exceptional Conditions

REPORTED_BY (1)

[Source]GitHub Advisory Database

VULNERABLE_TO (1)

[Software]npm/multiparty

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CVE-2026-8162 (CVSS 7.5) — Ninja Signal Threat Intelligence | Ninja Signal