CVE-2026-8159
Received Received - Intake
BaseFortify

Publication date: 2026-05-12

Last updated on: 2026-05-12

Assigner: openjs

Description
[email protected] and lower versions are vulnerable to denial of service via regular expression backtracking in the Content-Disposition filename parameter parser. A crafted multipart upload with a long header value can cause regex matching to take seconds, blocking the event loop. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: limiting upload sizes at the proxy or gateway layer reduces but does not eliminate the attack surface, since a small header of around 8 KB is sufficient to trigger the vulnerable backtracking. Upgrade to [email protected] or higher.
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Meta Information
Published
2026-05-12
Last Modified
2026-05-12
Generated
2026-06-22
EPSS Evaluated
2026-06-21
NVD
CVE-2026-8159
EUVD
EUVD-2026-29439
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-1333 The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
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