---
title: "CVE-2026-119420: Lago - Authentication Bypass"
description: "Lago <= 1.55.0 contains an authentication bypass caused by missing password check in acceptInvite mutation, letting organization administrators obtain session tokens and access sensitive data, exploit requires attacker to invite victim's email."
url: https://panop.io/threat-heartbeat/CVE-2026-119420/
---

# CVE-2026-119420 Lago - Authentication Bypass

Lago <= 1.55.0 contains an authentication bypass caused by missing password check in acceptInvite mutation, letting organization administrators obtain session tokens and access sensitive data, exploit requires attacker to invite victim's email.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.39% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-119420)

## Details

Type

Authentication Bypass

Impact

Broken Authentication, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-288](https://cwe.mitre.org/data/definitions/288.html)

## Vendor fix

Update to a version later than 1.55.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-119420](https://nvd.nist.gov/vuln/detail/CVE-2026-119420)
- [https://github.com/getlago/lago-api/pull/6146](https://github.com/getlago/lago-api/pull/6146)
- [https://www.vulncheck.com/advisories/lago-through-1.55.0-authentication-bypass-via-acceptinvite-graphql-mutation](https://www.vulncheck.com/advisories/lago-through-1.55.0-authentication-bypass-via-acceptinvite-graphql-mutation)
- [https://abraxaslabs.tech/research/lago-invite-ato](https://abraxaslabs.tech/research/lago-invite-ato)
- [https://github.com/getlago/lago-api](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/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/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/commit/5a9d5935b027d1db7171c7c015283d5870451305)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)