undici up to 7.30.1/8.12.3 Redirect Interceptor cross-domain policy

Summaryinfo

A vulnerability, which was classified as problematic, was found in undici up to 7.30.1/8.12.3. Affected is an unknown function of the component Redirect Interceptor. Such manipulation leads to cross-domain policy. This vulnerability is traded as CVE-2026-120474. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in undici up to 7.30.1/8.12.3. Affected by this issue is some unknown functionality of the component Redirect Interceptor. The manipulation with an unknown input leads to a cross-domain policy vulnerability. Using CWE to declare the problem leads to CWE-942. The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate. Impacted is confidentiality. CVE summarizes:

undici is an HTTP client for Node.js. In versions 7.0.0 through 7.30.1 and 8.0.0 through 8.12.3, when the redirect interceptor and a shared response cache are used together, an authenticated request that is redirected to a same-origin target has the final response stored under the original request's cache key. That key omits the credential and carries no Vary header, so a later anonymous or different user can be served the first user's private response body. This results in cross-user disclosure of cached private responses. The issue is fixed in undici 7.30.2 and 8.12.4, and users should upgrade to one of those versions or later.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-120474 since 11/02/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 7.30.2 or 8.12.4 eliminates this vulnerability.

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Productinfo

Name

• undici

Version

• 7.30.0
• 7.30.1
• 8.12.0
• 8.12.1
• 8.12.2
• 8.12.3

CPE 2.3info

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CPE 2.2info

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