CVE-2026-104040 Sssd: sssd: information disclosure via odata injection in entra id lookups
A local user can exploit improper escaping in SSSD Entra ID lookups to disclose directory data and cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104040?
CVE-2026-104040 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Weakness: CWE-140
Which versions are affected by CVE-2026-104040?
It affects 3 products.
Products include Fedoraproject Sssd, Redhat Enterprise Linux, Redhat Openshift Container Platform.
How do I fix CVE-2026-104040?
No fix has been published for CVE-2026-104040 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104040 being exploited?
There is no known exploitation of CVE-2026-104040 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
Sources
Also known as DEBIAN-CVE-2026-104040, GHSA-p2pv-jqxp-33qv, UBUNTU-CVE-2026-104040.