CVE-2026-119420 Details
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.
An authentication bypass vulnerability has been identified in Lago versions through 1.55.0. This vulnerability allows organization administrators to obtain session tokens for existing accounts via the acceptInvite mutation, without requiring a password. Attackers can exploit this by inviting a victim's email, accepting the invitation with a chosen password, and then receiving a JWT. This token can be used to access the victim's organizations, billing data, API keys, and payment integrations.
Users can update to Lago version 1.55.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 30, 2026CISA-ADP
Assessed Nov 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://abraxaslabs.tech/research/lago-invite-ato | CISA-ADP | ExploitTechnical Analysis |
| https://abraxaslabs.tech/research/lago-invite-ato | [email protected] | ExploitTechnical Analysis |
| https://github.com/getlago/lago-api | [email protected] | Vendor |
| https://github.com/getlago/lago-api/blob/v1.55.0/app/services/invites/accept_service.rb#L15-L16 | [email protected] | Source CodeVendor |
| https://github.com/getlago/lago-api/blob/v1.55.0/app/services/users_service.rb#L89-L98 | [email protected] | Source CodeVendor |
| https://github.com/getlago/lago-api/commit/5a9d5935b027d1db7171c7c015283d5870451305 | [email protected] | Source CodeVendor |
| https://github.com/getlago/lago-api/pull/6146 | [email protected] | Issue TrackingVendor |
| https://www.vulncheck.com/advisories/lago-through-1.55.0-authentication-bypass-via-acceptinvite-graphql-mutation | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-288 | Authentication Bypass Using an Alternate Path or Channel | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Lago | <= 1.55.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 5, 2026 | CVE Modified | CISA-ADP |
| Oct 30, 2026 | New CVE Received | [email protected] |