---
id: CVE-2026-54714
title: 'Logto is the modern, open-source auth infrastructure for SaaS and AI apps'
summary: >-
  Logto is the modern, open-source auth infrastructure for SaaS and AI apps.
  Prior to 1.41.0, @logto/core reflected the SAML RelayState, SAMLResponse, and
  actionUrl into a Logto-origin auto-submit HTML form in
  packages/core/src/saml-applic…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-07-10'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54714'
references:
  - url: >-
      https://github.com/logto-io/logto/commit/209fa0a5cbe8522f9cf31873239dc6424099bb5e
    label: security-advisories@github.com
  - url: 'https://github.com/logto-io/logto/pull/9008'
    label: security-advisories@github.com
  - url: 'https://github.com/logto-io/logto/releases/tag/v1.41.0'
    label: security-advisories@github.com
  - url: 'https://github.com/logto-io/logto/security/advisories/GHSA-cpm5-w86q-w85f'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00338
epssPercentile: 0.24525
ingestedAt: '2026-07-11T20:15:26.513Z'
---

## Overview

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, @logto/core reflected the SAML RelayState, SAMLResponse, and actionUrl into a Logto-origin auto-submit HTML form in packages/core/src/saml-application/SamlApplication/utils.ts without HTML-attribute escaping. A SAML application flow with a crafted RelayState from GET or POST /api/saml/:id/authn could inject script that runs on the Logto tenant origin after the user completes login. This issue is fixed in version 1.41.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.