undici vulnerable to cross-user information disclosure and parse-time crash via degenerate private cache directives

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

• CISA KEV Not listed.
• EPSS 0.0057, the 47th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 3 Aug 2026. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-4cwx-7wf7-3272
• OSV: GHSA-4cwx-7wf7-3272
• github.com/nodejs/undici/security/advisories/GHSA-4cwx-7wf7-3272
• nvd.nist.gov/vuln/detail/CVE-2026-13697
• github.com/nodejs/undici/commit/4fe5bc5fefe5ac81a200fc8e1cf84b8bf8464451
• cna.openjsf.org/security-advisories.html
• github.com/nodejs/undici
• github.com/nodejs/undici/releases/tag/v7.29.0
• github.com/nodejs/undici/releases/tag/v8.9.0

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.