CVE-2026-54714 | THREATINT

Description

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.

PUBLISHED Reserved 2026-06-15 | Published 2026-07-10 | Updated 2026-07-13 | Assigner GitHub_M

MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 1.41.0

affected

References

github.com/.../logto/security/advisories/GHSA-cpm5-w86q-w85f

github.com/logto-io/logto/pull/9008

github.com/...ommit/209fa0a5cbe8522f9cf31873239dc6424099bb5e

github.com/logto-io/logto/releases/tag/v1.41.0

cve.org (CVE-2026-54714)

nvd.nist.gov (CVE-2026-54714)

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