Google::Auth for Perl accepts login codes from any local process
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-346.
Summary
Google::Auth for Perl versions 0.11 through 0.12 accept an authorization code from any local process because the gcloud-auth login callback does not check the OAuth state parameter (CWE-346). A local attacker with low privileges can submit an authorization code for their own Google account, and the CLI stores the resulting refresh token as the user's credentials, so the user's tools act as the attacker's account.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Google-Auth | 0.11 – 0.12 | — | No fix listed | CNA |
- Google-Auth Vendor— Affected 0.11 – 0.12 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Google-Auth.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Timeline
- 2026-11-01 Threatist record created from CVE-2026-74760
- 2026-11-01 Alias added: GHSA-86rg-2xqg-4p5p
- 2026-11-06 CVSS score added · CISA ADP
- 2026-11-06 CISA SSVC decision points changed
Sources
- CVE-2026-74760 · CVE Program
- CVE-2026-74760 · NVD
- FIRST EPSS
- GHSA-86rg-2xqg-4p5p · GitHub Advisory Database · CC BY 4.0
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