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CVE-2026-90462— Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

A flaw was found in SSSD. When configured with the LDAP access provider and including or , a fail-open condition in the LDAP ppolicy access check can occur if a user lookup returns zero results. This can incorrectly return success and cache an allow decision,

CVSS 5.4 · Medium

Affected Version Matrix 7

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
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I. Basic Information for CVE-2026-90462

Vulnerability Information

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Vulnerability Title
Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in SSSD. When configured with the LDAP access provider and `ldap_access_order` including `ppolicy` or `lockout`, a fail-open condition in the LDAP ppolicy access check can occur if a user lookup returns zero results. This can incorrectly return success and cache an allow decision, permitting continued authorization for a deleted or deprovisioned user. A remote attacker with prior valid account context could exploit this to maintain access to information and potentially make limited modifications to resources that should no longer be available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分权限或特权的处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-90462

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III. Intelligence Information for CVE-2026-90462

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Vendor Advisories for CVE-2026-90462 (2)

Same Patch Batch · Red Hat · 2026-09-22 · 6 CVEs total

CVE-2026-13087 8.8 HIGH Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path...
CVE-2026-95619 7.7 HIGH Gcc: libstdc++ integer overflow in `new` operator
CVE-2026-94640 7.5 HIGH Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated
CVE-2026-95508 7.4 HIGH Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interfa
CVE-2026-95503 6.8 MEDIUM Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-280

V. Comments for CVE-2026-90462

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