Is CVE-2026-116592 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-116592 being exploited in the wild.

How severe is CVE-2026-116592?

High severity, with a CVSS score of 7.4, published 6 November 2026.

Which products and versions are affected?

OpenJS Foundation Undici 7.30.1, 8.12.2 through 8.12.3.

How is CVE-2026-116592 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-116592?

Check whether you run OpenJS Foundation Undici at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-116592: undici cache poisoning and cross-user disclosure via intermediate redirect

CVE-2026-116592 · Severity: high · CVSS 7.4 · Published 2026-11-06

undici is an HTTP client library for Node.js that handles web requests. When misconfigured with shared caching and redirects, it incorrectly caches responses that bounce through untrusted origins, allowing attackers to poison cached entries or serve private user data to other users. An attacker controlling a redirect target can leverage this to expose sensitive information or corrupt cached responses for legitimate requests.

Technologies: OpenJS Foundation Undici. Vendors: OpenJS Foundation.

Quick answers

Is CVE-2026-116592 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-116592 being exploited in the wild.
How severe is CVE-2026-116592?: High severity, with a CVSS score of 7.4, published 6 November 2026.
Which products and versions are affected?: OpenJS Foundation Undici 7.30.1, 8.12.2 through 8.12.3.
Is there a fix for CVE-2026-116592?: Yes: fixed in undici 7.30.2, 8.12.4. Until then: Compose interceptors as cache() then redirect() instead of redirect() then cache(), use per-origin dispatchers and cache stores, or disable shared caching on requests that use redirects. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-116592 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-116592?: Check whether you run OpenJS Foundation Undici at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: undici 7.30.2, 8.12.4

Compose interceptors as cache() then redirect() instead of redirect() then cache(), use per-origin dispatchers and cache stores, or disable shared caching on requests that use redirects.

Technical details

This vulnerability bypasses an earlier fix (CVE-2026-109829) by inspecting only the final redirect hop instead of all intermediate hops when deciding whether to cache a response. Intermediate hops' Vary headers, no-cache directives, and cache-control policies are dropped, allowing non-storable or user-specific responses to be cached and served to different users. The vulnerability requires an originless Agent, shared cache, and compose(redirect(), cache()) interceptor ordering; it affects undici 7.30.1 and 8.12.2–8.12.3.

Affected products

OpenJS Foundation undici 7.30.1, 8.12.2 through 8.12.3

Timeline

2026-11-06: disclosed
2026-11-06: patched

References

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