Google Auth 0.12 Aws External Account Credentials Aws.pm retrieve_subject_token imdsv2_session_token_url/url/region_url server-side request forgery

Summaryinfo

A vulnerability was found in Google Auth 0.12 and classified as critical. The impacted element is the function retrieve_subject_token of the file lib/Google/Auth/ExternalAccountCredentials/Aws.pm of the component Aws External Account Credentials. The manipulation of the argument imdsv2_session_token_url/url/region_url results in server-side request forgery. This vulnerability was named CVE-2026-74759. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in Google Auth 0.12. Affected is the function retrieve_subject_token of the file lib/Google/Auth/ExternalAccountCredentials/Aws.pm of the component Aws External Account Credentials. The manipulation of the argument imdsv2_session_token_url/url/region_url with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Google::Auth versions 0.12 for Perl allow server side request forgery via unvalidated credential_source URLs in AWS external account credentials. An external_account configuration with the AWS subject token type selects Google::Auth::ExternalAccountCredentials::Aws. Its retrieve_subject_token sends requests to the imdsv2_session_token_url, url and region_url fields of credential_source without the host check that the other credential classes apply. Any caller that builds credentials from a configuration it does not fully control issues GET and PUT requests to hosts the configuration names, including internal services and link-local metadata endpoints.

The advisory is available at metacpan.org. This vulnerability is traded as CVE-2026-74759 since 08/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 11/01/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Google

Name

• Auth

Version

• 0.12

License

• free

Website

• Vendor: https://www.google.com/

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