Quick answers
- Is CVE-2026-127101 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-127101 being exploited in the wild.
- How severe is CVE-2026-127101?
- Medium severity, with a CVSS score of 5.5, published 12 November 2026.
- Which products and versions are affected?
- SSSD Project SSSD.
- Is there a fix for CVE-2026-127101?
- 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-2026-127101 attacked?
- It is attacked with local access, in a hosted service.
- Am I affected by CVE-2026-127101?
- Check whether you run SSSD Project 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
A NULL pointer dereference vulnerability exists in SSSD's PAM responder when a local attacker sends an authentication request before completing client protocol version negotiation. The responder fails to validate the protocol-version pointer and crashes, preventing PAM authentication. Attack requires local access to the PAM responder socket and low privileges; repeated requests sustain denial of service.
Affected products
- SSSD Project SSSD
Timeline
- 2026-11-12: disclosed