Vulnerability · Published Oct 6, 2026 · Assigned by redhat
CVE-2026-104040Sssd: sssd: information disclosure via odata injection in entra id lookups
Medium 4.4
In plain English
A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Official description
A flaw was found in SSSD. When configured with the Entra ID identity provider, input lookup names containing single quotes are not properly escaped before being included in Microsoft Graph Open Data Protocol (OData) queries. A low-privileged local user can exploit this flaw by submitting a crafted search request, altering query filters to broaden user or group searches. This can lead to information disclosure by retrieving unintended directory objects, as well as a Denial of Service (DoS) through excessive processing and cache population.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | sssd | no fix listed | DEBIAN-CVE-2026-104040 |
| Debian:13 | sssd | no fix listed | DEBIAN-CVE-2026-104040 |
| Ubuntu:22.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-104040 |
| Ubuntu:24.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-104040 |
| Ubuntu:26.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-104040 |
| Ubuntu:26.10 | sssd | no fix listed | UBUNTU-CVE-2026-104040 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 5 | see references |
Weakness: CWE-140 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
References
- https://access.redhat.com/security/cve/CVE-2026-104040 vdb-entry, x_refsource_REDHAT
- RHBZ#2478915 issue-tracking, x_refsource_REDHAT