CVE-2026-90996

MEDIUMPre-NVD 4.04.0—
EchelonGraph scoreHIGH confidence

Score 4.0 from GitHub Security Advisory published 2026-09-14. a secondary CVSS source baseline 4.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
4.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.0Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to the Network Security Services (NSS) responder. This could lead to a denial-of-service condition, causing the NSS responder to become unstable or terminate. This vulnerability affects the availability of the system responder.

CVSS v3
4.0
EG Score
4.0(high)
EG Risk
18(Track)
EG Risk 18/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity40% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Sep 14, 2026
Patch available. Sources: redhat.
redhat

2478986 – (CVE-2026-90996) CVE-2026-90996 sssd: sssd: Denial of Service in NSS responder via crafted zero-length requests

https://bugzilla.redhat.com/show_bug.cgi?id=2478986
redhat Patch Available

CVE-2026-90996 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-90996

Vendor Advisories for CVE-2026-90996(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 17:48 UTCEG score recompute
  2. 2026-09-19 17:48 UTCGHSA enrichment
  3. 2026-09-18 18:41 UTCGHSA enrichment
  4. 2026-09-17 19:33 UTCEG score recompute
  5. 2026-09-17 19:33 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-16 19:58 UTCGHSA enrichment
  8. 2026-09-16 16:56 UTCEG score recompute
  9. 2026-09-16 16:56 UTCGHSA enrichment
  10. 2026-09-16 15:29 UTCEG score recompute
  11. 2026-09-16 15:29 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 16:53 UTCEG score recompute
  15. 2026-09-15 16:53 UTCGHSA enrichment
  16. 2026-09-14 17:45 UTCEG score recompute
  17. 2026-09-14 16:24 UTCEG score recompute
  18. 2026-09-14 16:05 UTCEG score recompute
  19. 2026-09-14 16:04 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90996?
CVE-2026-90996 is a medium vulnerability published on September 14, 2026. A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to the Network Security Services (NSS) responder. This could lead to a denial-of-service condition, causing the NSS responder to become unstable or terminate. This vulnerability…
When was CVE-2026-90996 disclosed?
CVE-2026-90996 was first published in the National Vulnerability Database on September 14, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90996 actively exploited?
CVE-2026-90996 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.5% of all scored CVEs.
What is the CVSS score of CVE-2026-90996?
CVE-2026-90996 has a CVSS v3 base score of 4.0 (NVD).
How do I remediate CVE-2026-90996?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90996, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-90996

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