CVE-2026-55789

{"id": "CVE-2026-55789", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55789", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-13T18:16:09.500167Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.7, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "logto-io", "product": "logto", "versions": [{"status": "affected", "version": "< 1.41.0"}]}]}], "published": "2026-07-10T20:16:47.933", "references": [{"url": "https://github.com/logto-io/logto/commit/9097054860f0d638d90778d3dcde2ba050b844b6", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/pull/9107", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/releases/tag/v1.41.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/security/advisories/GHSA-vfpw-vq44-4p63", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/security/advisories/GHSA-vfpw-vq44-4p63", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-91"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-07-13T19:21:55.683", "sourceIdentifier": "security-advisories@github.com"}