CVEvulnerability
CVE-2026-8159
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-12
- Last modified
- 2026-06-17
- Assigner
- ce714d77-add3-4f53-aff5-83d477b104bb
- CVSS 3.1 (ce714d77-add3-4f53-aff5-83d477b104bb)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1333
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.
Affected configurations
• pillarjs multiparty (< 4.3.0)
Related
Weakness · CWE (1)
- CWE-1333 Inefficient Regular Expression Complexity weakness
References
- https://cna.openjsf.org/security-advisories.html Third Party Advisory
- https://github.com/pillarjs/multiparty/security/advisories/GHSA-65x3-rw7q-gx94 Mitigation, Vendor Advisory
- https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS Not Applicable