CVE-2026-88882
Description
A flaw was found in Renovate, a dependency update automation tool. When listing new package versions from a NuGet registry, Renovate follows pagination URLs provided in the HTTP Link header without verifying the target's origin. A malicious or compromised NuGet registry can exploit this by returning a Link header pointing to an attacker-controlled server. This can cause Renovate to send sensitive registry credentials to the attacker, leading to credential exfiltration.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Integrity
Technical Impact: Execute Unauthorized Code or Commands
Access Control
Technical Impact: Bypass Protection Mechanism
By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
Frequently Asked Questions
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