PT-2026-57279 · Logto Io · Logto

Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-54714

Mitre

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-54714

Affected Products

Logto

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-54714 · Security Note
• https://github.com/logto-io/logto/releases/tag/v1.41.0 · Note
• https://github.com/logto-io/logto/security/advisories/GHSA-cpm5-w86q-w85f · Note
• https://github.com/logto-io/logto/commit/209fa0a5cbe8522f9cf31873239dc6424099bb5e · Note
• https://github.com/logto-io/logto/pull/9008 · Note