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CVE-2026-74760

OAuth state bypass in Google::Auth Perl gcloud-auth login

CVSS
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EPSS
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Published
·
Modified
Analyze CVE-2026-74760 with Vani AIImpact, affected versions, exploitation status, mitigations and detection

Google::Auth for Perl versions 0.11 through 0.12 accepts authorization code from any local process as gcloud-auth login callback does not check OAuth state. A local attacker can submit an authorization code for their own Google account. The CLI exchanges it and stores the refresh token as the user's credentials, allowing the attacker to act as the victim.

What to do: Upgrade Google::Auth Perl to a fixed version. Apply Google's update for CVE-2026-74760.

ProductAffected
Google::Auth0.11 through 0.12
Estimated exposure
nicheNo basis for an estimate.

Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.

Description · NVD

Google::Auth versions from 0.11 through 0.12 for Perl accept an authorization code from any local process because the gcloud-auth login callback does not check the OAuth state. The gcloud-auth login and application-default login commands send a state parameter with the authorization request, then take the code from the first request to reach their loopback listener without comparing the returned state. A local attacker can submit an authorization code for their own Google account. The CLI exchanges it and stores the refresh token as the user's credentials, so the user's tools then act as the attacker's account.

Weakness
CWE-346

In the news

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