CVE-2026-8161: multiparty · Uncaught Exception
Affects multipartySource GCVE Database
Not known to be exploited · CVSS 7.5 High · fixed in 4.3.0 : patch multiparty soon.
Data as of 11 Nov 2026, 23:07 UTC
Thin evidence
One scorer or none| CNA (openjs) | CVSS 3.1 | 7.5 |
|---|
- Patch
- Available – fixed in 4.3.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 12 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| multiparty multiparty | Affected
| Fixed in– |
AI-suggested
Upgrade multiparty to version 4.3.0 or higher to remediate this vulnerability. There are no workarounds available.
Description
multiparty versions 4.2.3 and earlier contain a vulnerability where sending a multipart/form-data request with a field name matching an inherited Object.prototype property causes an uncaught exception. This exception crashes the process, resulting in a denial of service. The issue is fixed in version 4.3.0.