node-modules urllib up to 2.44.0/4.9.0 Redirect src/HttpClient.ts #requestInternal cross-domain policy

Summaryinfo

A vulnerability identified as problematic has been detected in node-modules urllib up to 2.44.0/4.9.0. Affected by this vulnerability is the function #requestInternal of the file src/HttpClient.ts of the component Redirect Handler. This manipulation causes cross-domain policy. This vulnerability is handled as CVE-2026-55553. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in node-modules urllib up to 2.44.0/4.9.0 and classified as problematic. Affected by this vulnerability is the function #requestInternal of the file src/HttpClient.ts of the component Redirect Handler. The manipulation with an unknown input leads to a cross-domain policy vulnerability. The CWE definition for the vulnerability is CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. As an impact it is known to affect confidentiality. The summary by CVE is:

urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, #requestInternal recursively calls this.#requestInternal(nextUrl.href, options, requestContext), causing options.headers and auth or digestAuth values to be reused when the redirect target has a different scheme, host, or port. Authorization, Cookie, Proxy-Authorization, x-api-key, x-auth-token, and x-access-token can therefore be sent to an attacker-controlled redirected origin, exposing credentials intended for the original origin and potentially allowing reuse against the original partner API or related services. No user interaction is required. This issue is fixed in versions 2.44.1 and 4.9.1.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-55553 since 06/17/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 2.44.1 or 4.9.1 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• node-modules

Name

• urllib

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.40
• 2.41
• 2.42
• 2.43
• 2.44.0
• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9.0

Website

• Product: https://github.com/node-modules/urllib/

CPE 2.3info

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CPE 2.2info

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