Is CVE-2026-104046 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104046 being exploited in the wild.

How severe is CVE-2026-104046?

Medium severity, with a CVSS score of 6.2, published 6 October 2026.

Is there a fix for CVE-2026-104046?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-104046 attacked?

It is attacked with local access.

Am I affected by CVE-2026-104046?

Check whether you run Sssd. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104046: SSSD memory exhaustion in IdP authentication pre-requests

CVE-2026-104046 · Severity: medium · CVSS 6.2 · Published 2026-10-06

SSSD (System Security Services Daemon) is a system service that manages authentication and identity services for Linux. When Identity Provider (IdP) authentication is enabled, incomplete authentication requests accumulate in memory without cleanup, allowing a local attacker to exhaust memory and cause service denial by repeatedly starting authentication flows they don't complete. The attack requires local system access but needs no special privileges.

Technologies: Sssd.

Quick answers

Is CVE-2026-104046 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104046 being exploited in the wild.
How severe is CVE-2026-104046?: Medium severity, with a CVSS score of 6.2, published 6 October 2026.
Which products and versions are affected?: SSSD.
Is there a fix for CVE-2026-104046?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-104046 attacked?: It is attacked with local access.
Am I affected by CVE-2026-104046?: Check whether you run Sssd. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a resource exhaustion flaw (CWE-770) in SSSD's pre-authentication state management when IdP authentication is active. A local, unprivileged attacker can repeatedly trigger device pre-authentication flows without completing them, causing SSSD to retain orphaned authentication state indefinitely. This unbounded memory accumulation results in denial of service by degrading or terminating the SSSD backend process.

Affected products

SSSD

Timeline

2026-10-06: disclosed

References

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