Read the docs
TI-2026-29368 Aliases CVE-2026-40683GHSA-pfx2-9x9m-7ghx

Type confusion in OpenStack Keystone

Priority LOW 34CWE-843Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · Low · High
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

In OpenStack Keystone before 28.0.1, the LDAP identity backend does not convert the user enabled attribute to a boolean when the user_enabled_invert configuration option is False (the default). The _ldap_res_to_model method in the UserApi class only performed string-to-boolean conversion when user_enabled_invert was True. When False, the raw string value from LDAP (e.g., "FALSE") was used directly. Since non-empty strings are truthy in Python, users marked as disabled in LDAP were treated as enabled by Keystone, allowing them to authenticate and perform actions. All deployments using the LDAP identity backend without user_enabled_invert=True or user_enabled_emulation are affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00337 27th percentileScored 2026-11-07
Fix Partial Keystone (OpenStack): 25.0.1, 26.1.1, 27.0.1 +1keystone (PyPI): 28.0.1Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenStackKeystone8.0.0 to before 25.0.1; 26.0.0 to before 26.1.1; 27.0.0 to before 27.0.1; 28.0.0 to before 28.0.125.0.1, 26.1.1, 27.0.1, 28.0.1Patch availableCNA
—keystone (PyPI)before 28.0.128.0.1Patch availableGHSA-pfx2-9x9m-7ghx
  • Keystone VendorOpenStack Affected 8.0.0 to before 25.0.1; 26.0.0 to before 26.1.1; 27.0.0 to before 27.0.1; 28.0.0 to before 28.0.1 Fixed in 25.0.1, 26.1.1, 27.0.1, 28.0.1 Patch available CNA
  • keystone (PyPI) Vendor— Affected before 28.0.1 Fixed in 28.0.1 Patch available GHSA-pfx2-9x9m-7ghx

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*——OpenStack
  • cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:* Versions — — ·OpenStack

Remediation

  • Fix · CNA Keystone (OpenStack) Fixed in 25.0.1, 26.1.1, 27.0.1, 28.0.1
  • Fix · GHSA-pfx2-9x9m-7ghx keystone (PyPI) Fixed in 28.0.1 Advisory →

Red Hat 1 advisory

  • RHSA-2026:39808 Released 2026-07-15 · Red Hat rating Important
    Red Hat OpenStack Services on OpenShift 18.0 (openstack-keystone) security update
    • Red Hat OpenStack Services on OpenShift 18.0 openstack-keystone-1:23.0.3-18.0.20260610133808.9e3dfb4.el9ost, python3-keystone-1:23.0.3-18.0.20260610133808.9e3dfb4.el9ost

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenStack Platform 13 (Queens)AffectedNo fix yet
Red Hat OpenStack Services on OpenShift 18.0Fixed RHSA-2026:39808
Not affected: 3 products
  • Red Hat OpenStack Platform 16.2
  • Red Hat OpenStack Platform 17.1
  • Red Hat OpenStack Platform 18.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40683
  2. 2026-10-03 Alias added: GHSA-pfx2-9x9m-7ghx

References

Advisory 1

Other 5

  • TI-2026-78562 Incorrect authorization in OpenStack Manila share operations CVSS 3.1CRITICAL 9.9
  • TI-2026-63467 Code injection in OpenStack Octavia CVSS 4.0CRITICAL 9.4
  • TI-2017-13226 The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before… CVSS 3.1CRITICAL 9.8
  • TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resources CVSS 4.0HIGH 7.2
  • TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied action CVSS 4.0HIGH 8.7
  • TI-2022-17779 Improper privilege management in OpenStack CVSS 3.1HIGH 8.8
See all 332 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences