GHSA-r4pc-4jcp-7pqc: undici (CVE-2026-120423)

undici vulnerable to Subresource Integrity bypass via whitespace in integrity metadata

CVSS 5.9 MediumEPSS 0.0013 · 2nd percentile

Published by the maintainers · not yet reviewed by GitHub. The nodejs/undici maintainers published this as a GitHub repository advisory; GitHub’s reviewed advisory replaces it here when it arrives.

Published by the nodejs/undici maintainers at 5 Nov 2026, 10:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
undici	npm	>=7.15.0, <7.30.2 \|\| >=8.0.0, <8.12.4	7.30.2, 8.12.4

Identifiers

GHSA-r4pc-4jcp-7pqc · CVE-2026-120423

Weakness (CWE)

CWE-354

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N	CNA (openjs)

CISA KEV Not listed.
EPSS 0.0013, the 2nd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

5 Nov 2026, 10:27 UTC Published by the maintainers as a GitHub repository advisory
6 Nov 2026, 10:08 UTC Confirmed by the CVE List
6 Nov 2026, 10:16 UTC First seen by agentprime
6 Nov 2026, 10:16 UTC Confirmed by NVD

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.