CVE-2025-12414 Looker account compromise via punycode homograph attack
Attackers can compromise Looker accounts via punycode homograph attacks in OIDC configurations, requiring upgrades for self-hosted instances.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-12414?
CVE-2025-12414 is a critical authentication bypass vulnerability in Google Cloud Looker, published on 20 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An attacker could take over a Looker account in a Looker instance configured with OIDC authentication, due to email address string normalization.Looker-hosted and Self-hosted were found to be vulnerable.
This issue has already been mitigated for Looker-hosted.
Self-hosted instances must be upgraded as soon as possible. This vulnerability has been patched in all supported versions of Self-hosted. The versions below have all been updated to protect from this vulnerability. You can download these versions at the Looker download page https://download.looker.com/ : * 24.12.100+ * 24.18.193+ * 25.0.69+ * 25.6.57+ * 25.8.39+ * 25.10.22+ * 25.12.0+
Weakness: CWE-290
Which versions are affected by CVE-2025-12414?
How do I fix CVE-2025-12414?
No fix has been published for CVE-2025-12414 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-12414 being exploited?
There is no known exploitation of CVE-2025-12414 in the wild and no public exploit code.
Sources
Also known as GHSA-5vh2-6vmq-fw7j.