CVE-2026-93493

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreHIGH confidence

Score 5.9 from GitHub Security Advisory published 2026-09-18. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 5 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: 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 Netty's netty-handler-ssl-ocsp component. A remote attacker can exploit this vulnerability by providing an Online Certificate Status Protocol (OCSP) response that omits the optional nextUpdate field. This omission causes the OCSP validation to be silently skipped, leading to applications proceeding with an unvalidated certificate. This can result in a bypass of security controls where certificate validation is expected.

CVSS v3
5.9
EG Score
5.9(high)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 18, 2026

Advisory Details (2)

Auto-updated Sep 18, 2026
Patch available. Sources: redhat.
redhat

2536897 – (CVE-2026-93493) CVE-2026-93493 netty: netty-handler-ssl-ocsp: io.netty/netty-handler-ssl-ocsp: Netty: OCSP Validation Silently Skipped When a Response Omits the Optional nextUpdate Field

https://bugzilla.redhat.com/show_bug.cgi?id=2536897
redhat Patch Available

CVE-2026-93493 - 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-2026-93493

Vendor Advisories for CVE-2026-93493(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 16× in last 7d / 16× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:08 UTCGHSA enrichment
  3. 2026-09-18 15:25 UTCEG score recompute
  4. 2026-09-18 15:25 UTCGHSA enrichment
  5. 2026-09-18 14:44 UTCEG score recompute
  6. 2026-09-18 14:44 UTCGHSA enrichment
  7. 2026-09-18 11:49 UTCEG score recompute
  8. 2026-09-18 11:49 UTCGHSA enrichment
  9. 2026-09-18 11:20 UTCEG score recompute
  10. 2026-09-18 11:20 UTCGHSA enrichment
  11. 2026-09-18 10:49 UTCEG score recompute▲ 5.90
  12. 2026-09-18 10:49 UTCGHSA enrichment
  13. 2026-09-18 10:49 UTCMITRE cvelistV5CVSS v3 → 5.9 · severity → MEDIUM
  14. 2026-09-18 08:26 UTCNVD update
  15. 2026-09-18 08:14 UTCEG score recompute
  16. 2026-09-18 08:14 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-93493?
CVE-2026-93493 is a medium vulnerability published on September 18, 2026. A flaw was found in Netty's netty-handler-ssl-ocsp component. A remote attacker can exploit this vulnerability by providing an Online Certificate Status Protocol (OCSP) response that omits the optional nextUpdate field. This omission causes the OCSP validation to be silently skipped, leading to…
When was CVE-2026-93493 disclosed?
CVE-2026-93493 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-93493 actively exploited?
CVE-2026-93493 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 95.4% of all scored CVEs.
What is the CVSS score of CVE-2026-93493?
CVE-2026-93493 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-93493?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93493, 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-2026-93493

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