multiparty@4.2.3 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 multiparty@4.3.0 or higher.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - multiparty@4.2.3 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 multiparty@4.3.0 or higher. (CVE-2026-8159)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - multiparty@4.2.3 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 multiparty@4.3.0 or higher. (CVE-2026-8159)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
442056	SCA: security update for multiparty (GHSA-65x3-rw7q-gx94)	Tenable Cloud Security	SCA Checks	Local	high
442056	SCA: security update for multiparty (GHSA-65x3-rw7q-gx94)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
314489	Linux Distros Unpatched Vulnerability : CVE-2026-8159	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-8159

high

Tenable Plugins

high

high

high