CVE-2026-119420 Lago through 1.55.0 Authentication Bypass via acceptInvite GraphQL Mutation

High 8.7 Published 30 Oct 2026 Updated 5 Nov 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-119420?

CVE-2026-119420 is a high-severity vulnerability in getlago lago, published on 30 Oct 2026.

Official description

Lago through 1.55.0 contains an authentication bypass vulnerability that allows organization administrators to obtain session tokens for existing accounts via the acceptInvite mutation without a password check. Attackers can invite a victim's email, accept with an arbitrary password, and receive a JWT to access the victim's organizations, billing data, API keys and payment integrations.

Weakness: CWE-288

Which versions are affected by CVE-2026-119420?

How do I fix CVE-2026-119420?

No fix has been published for CVE-2026-119420 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-119420 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-119420 exists.

Sources

Also known as GHSA-gvqv-g6vj-p22g.