CVE-2026-119420

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.

Metrics

CVSS 3.1

8.8 (HIGH) Score source: NVD CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

8.7 (HIGH) Score source: CNA CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — exploit probability

0% (percentile: 34) as of 1 November 2026

CWE

CWE-288

References

• https://abraxaslabs.tech/research/lago-invite-ato
• https://github.com/getlago/lago-api
• https://github.com/getlago/lago-api/blob/v1.55.0/app/services/invites/accept_se…
• https://github.com/getlago/lago-api/blob/v1.55.0/app/services/users_service.rb#…
• https://github.com/getlago/lago-api/commit/5a9d5935b027d1db7171c7c015283d587045…
• https://github.com/getlago/lago-api/pull/6146
• https://www.vulncheck.com/advisories/lago-through-1.55.0-authentication-bypass-…