CVE-2026-55789

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's self-hosted SAML application IdP built the signed SAML response and assertion by string-substituting user-controlled profile attributes such as name, email, and custom attribute-mapping values into...

CVE-2026-55377

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's Account Center step-up check accepted any active verification record that belonged to the current user and had isVerified === true. A WebAuthn registration verification record for binding a new...

CVE-2026-54714

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...

CVE-2026-55377

Technical details about CVE-2026-55377 are not publicly available in the provided documents. Monitor for updates.

CVE-2026-55377 Logto: Account Center MFA management step-up bypass via WebAuthn registration verification

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's Account Center step-up check accepted any active verification record that belonged to the current user and had isVerified === true. A WebAuthn registration verification record for binding a new...

CVE-2026-55377 Logto: Account Center MFA management step-up bypass via WebAuthn registration verification

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's Account Center step-up check accepted any active verification record that belonged to the current user and had isVerified === true. A WebAuthn registration verification record for binding a new...

CVE-2026-55370 Logto: TOTP code can be replayed within the RFC 6238 validity window (one-time use violation)

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's existing TOTP verification accepted a successfully used TOTP code again while the code remained inside the RFC 6238 acceptance window because the verifier used otplib's stateless check with window ...

CVE-2026-55370 Logto: TOTP code can be replayed within the RFC 6238 validity window (one-time use violation)

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's existing TOTP verification accepted a successfully used TOTP code again while the code remained inside the RFC 6238 acceptance window because the verifier used otplib's stateless check with window ...

CVE-2026-55370

Technical details about CVE-2026-55370 are not publicly available in the provided documents. Monitor for updates.

EUVD-2026-43011

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's existing TOTP verification accepted a successfully used TOTP code again while the code remained inside the RFC 6238 acceptance window because the verifier used otplib's stateless check with window ...

CVE-2026-55789 Logto: SAML IdP injects user-controlled profile attributes raw into signed assertions, allowing privilege escalation at relying Service Providers

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's self-hosted SAML application IdP built the signed SAML response and assertion by string-substituting user-controlled profile attributes such as name, email, and custom attribute-mapping values into...

CVE-2026-55789 Logto: SAML IdP injects user-controlled profile attributes raw into signed assertions, allowing privilege escalation at relying Service Providers

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's self-hosted SAML application IdP built the signed SAML response and assertion by string-substituting user-controlled profile attributes such as name, email, and custom attribute-mapping values into...

CVE-2026-55789

Logto’s self-hosted SAML IdP (prior to v1.41.0) was vulnerable: it built signed SAML responses by substituting user-controlled profile attributes into an unescaped XML template, allowing an authenticated low-privilege user to forge a SAML attribute (e.g., role) and cause privilege escalation at r...

CVE-2026-54714

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...

CVE-2026-54714 Logto: XSS via unescaped RelayState in SAML auto-submit form

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...

CVE-2026-54714

Technical details about CVE-2026-54714 are not publicly available in the provided documents. Monitor for updates from Logto advisories and releases.

CVE-2026-54714 Logto: XSS via unescaped RelayState in SAML auto-submit form

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...

PT-2026-57292

Name of the Vulnerable Software and Affected Versions Logto versions prior to 1.41.0 Description The self-hosted SAML application IdP constructs signed SAML responses and assertions by substituting user-controlled profile attributes, such as name, email, and custom attribute-mapping values, into...

PT-2026-57282

Name of the Vulnerable Software and Affected Versions Logto versions prior to 1.41.0 Description The Account Center step-up check accepts any active verification record belonging to the current user where isVerified is set to true. An attacker with an existing Account API bearer token can create...