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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74760
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-01 17:16:34 UTC
Updated2026-11-02 19:34:23 UTC
DescriptionGoogle::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.

Risk And Classification

Problem Types: CWE-346 | CWE-346 CWE-346 Origin Validation Error

References

ReferenceSourceLinkTags
metacpan.org/release/CJCOLLIER/Google-Auth-0.12/source/bin/gcloud-auth.pl 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to a future Google-Auth release.

Workarounds

CNA: Run gcloud-auth login and gcloud-auth application-default login with --no-browser, which uses the out-of-band flow without a loopback listener.

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