---
id: CVE-2026-74759
title: >-
  Google::Auth versions 0.12 for Perl allow server side request forgery via
  unvalidated credential_source URLs in AWS external account credentials
summary: >-
  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::Ex…
severity: none
cwe:
  - CWE-918
product: Google-Auth
affected:
  - Google-Auth 0.12
published: '2026-11-01'
updated: '2026-11-01'
sourceUpdated: '2026-11-01T16:43:14.737Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74759'
references:
  - url: >-
      https://metacpan.org/release/CJCOLLIER/Google-Auth-0.12/source/lib/Google/Auth/ExternalAccountCredentials/Aws.pm
tags:
  - cve.org
epss: 0.00177
epssPercentile: 0.0729
ingestedAt: '2026-11-05T18:28:50.723Z'
---

## Overview

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.

## Affected

- `Google-Auth 0.12`

## Remediation

Upgrade to a future Google-Auth release.

### Workarounds

Ensure that every credentials configuration reaching the Application Default Credentials flow comes from a trusted source.