CVE-2026-104040: Improper Neutralization of Delimiters in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-104040 is a medium severity vulnerability in SSSD on Red Hat Enterprise Linux 10. It involves improper escaping of single quotes in input lookup names when using the Entra ID identity provider, leading to altered Microsoft Graph OData queries. A low-privileged local user can exploit this to disclose unintended directory information or cause denial of service by excessive processing.
CVSS v3.1
Score 4.4medium
Affected software
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat OpenShift Container Platform 4
Red Hat
Red Hat OpenShift Container Platform 4
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in SSSD occurs when configured with the Entra ID identity provider. Input lookup names containing single quotes are not properly escaped before being included in Microsoft Graph OData queries. A low-privileged local user can submit crafted search requests that alter query filters, broadening user or group searches beyond intended scope. This can result in information disclosure of directory objects and denial of service due to excessive processing and cache population.
Potential Impact
The flaw allows a low-privileged local user to retrieve unintended directory objects, leading to information disclosure. Additionally, it can cause denial of service by overwhelming the system with excessive processing and cache population. There is no indication of integrity impact or remote exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-104040 for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-10-01T17:23:42.805Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-104040","vendor":"Red Hat"}]
Threat ID: 6ac450002cdf04f6566c70d8
Added to database: 10/06/2026, 01:33:52 UTC
Last enriched: 10/06/2026, 01:48:32 UTC
Last updated: 10/06/2026, 01:48:32 UTC
Views: 5
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