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CVE-2023-45143

CVE-2023-45143 · Undici's cookie header not cleared on cross-origin redirect in fetch

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Undici is an HTTP/1.1 client written from scratch for Node.js. Prior to version 5.26.2, Undici already cleared Authorization headers on cross-origin redirects, but did not clear `Cookie` headers. By design, `cookie` headers are forbidden request headers, disallowing them to be set in RequestInit.headers in browser environments. Since undici handles headers more liberally than the spec, there was a disconnect from the assumptions the spec made, and undici's implementation of fetch. As such this may lead to accidental leakage of cookie to a third-party site or a malicious attacker who can control the redirection target (ie. an open redirector) to leak the cookie to the third party site. This was patched in version 5.26.2. There are no known workarounds.

CVSS 3.9 · Low · EPSS 1.4% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • undici

    Versions
    • < 5.26.2: Affected

    No fix published

  • node-undici Debian:12

    Versions
    • 5.15.0+dfsg1+~cs20.10.9.3-1
    • 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u1
    Affected ranges
    • ECOSYSTEM: < 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u2

    Update to 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u2

  • node-undici Debian:13

    Affected ranges
    • ECOSYSTEM: < 5.26.3+dfsg1+~cs23.10.12-1

    Update to 5.26.3+dfsg1+~cs23.10.12-1

  • node-undici Debian:14

    Affected ranges
    • ECOSYSTEM: < 5.26.3+dfsg1+~cs23.10.12-1

    Update to 5.26.3+dfsg1+~cs23.10.12-1

  • undici npm

    Affected ranges
    • SEMVER: < 5.26.2

    Update to 5.26.2

  • node-undici Ubuntu:24.04:LTS

    Versions
    • 5.22.1+dfsg1+~cs20.10.10.2-1ubuntu1
    • 5.26.3+dfsg1+~cs23.10.12-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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