Description
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 element-text placeholders of a SAML XML template using samlify 2.10.0, which left those placeholders unescaped. An authenticated low-privilege user could place XML markup in a profile attribute so Logto signed a forged SAML attribute, such as an arbitrary role, allowing privilege escalation at relying Service Providers that authorize on SAML attributes. This issue is fixed in version 1.41.0.
Severity (CVSS)
| Base score | 8.5 |
|---|---|
| Severity | High |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N |
| Provided by | CNA |
Weaknesses
- CWE-91 — CWE-91: XML Injection (aka Blind XPath Injection)
- CWE-1395 — CWE-1395: Dependency on Vulnerable Third-Party Component
Affected products
| Vendor | Product | Versions |
|---|---|---|
| logto-io | logto | < 1.41.0 |
References
- https://github.com/logto-io/logto/security/advisories/GHSA-vfpw-vq44-4p63 (x_refsource_CONFIRM)
- https://github.com/logto-io/logto/pull/9107 (x_refsource_MISC)
- https://github.com/logto-io/logto/commit/9097054860f0d638d90778d3dcde2ba050b844b6 (x_refsource_MISC)
- https://github.com/logto-io/logto/releases/tag/v1.41.0 (x_refsource_MISC)
Generated from the official CVE List on 11 Jul 2026 07:02 UTC.