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CVE-2026-119420
HIGH8.8
Published 2026-10-30 · Source disclosure@vulncheck.com
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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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_service.rb#L15-L16
- https://github.com/getlago/lago-api/blob/v1.55.0/app/services/users_service.rb#L89-L98
- https://github.com/getlago/lago-api/commit/5a9d5935b027d1db7171c7c015283d5870451305
- https://github.com/getlago/lago-api/pull/6146
- https://www.vulncheck.com/advisories/lago-through-1.55.0-authentication-bypass-via-acceptinvite-graphql-mutation

