Vulnerability · Published Nov 1, 2026 · Assigned by CPANSec

CVE-2026-74760Google::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

Unrated

In plain English

A security flaw in Google-Auth. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS )–Not rated

Exploit odds (30 days)0.1%top 97.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
	Google-Auth	0.11 – through 0.12

Weakness: CWE-346

References

https://metacpan.org/release/CJCOLLIER/Google-Auth-0.12/source/bin/gcloud-auth.pl technical-description