Lago: Authentication bypass in acceptInvite mutation (CVE-2026-119420)
Lago versions through 1.55.0 contain an authentication bypass vulnerability that allows organization administrators to obtain session tokens for existing accounts via the acceptInvite mutation without a password check.
CVE search metadata
CVE search record: CVE-2026-119420. Severity: high. CVSS: 8.8. KEV: no. Product: Lago (<= 1.55.0). Brief: Lago: Authentication bypass in acceptInvite mutation (CVE-2026-119420). Brief link: https://feed.craftedsignal.io/briefs/2026-10-lago-auth-bypass/
Triage facts
Revision 1- Applicability
- Lago (<= 1.55.0)
- Evidence
- Unknown
- Severity
- High
- Sources
- 1 public source
- Freshness
- Revision 1Oct 30, 13:29 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
Lago versions through 1.55.0 are vulnerable to an authentication bypass via the acceptInvite mutation. An attacker can invite a victim's email, accept the invitation with an arbitrary password, and receive a JWT. This enables access to the victim's organizations, billing data, API keys, and payment integrations.