Description
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.
Published: 2026-09-18
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Bypassed Certificate Validation
Action: Assess Impact
AI Analysis

Impact

The vulnerability allows an attacker to supply a forged OCSP response that omits the optional nextUpdate field, causing the Netty component to silently skip validation. The resulting lack of certificate verification can enable the use of revoked or otherwise untrusted certificates, effectively bypassing application‑level security controls.

Affected Systems

The flaw affects Red Hat’s build of Apache Camel for Spring Boot 4, found in the Netty network library bundled with that product. The affected version range is reflected in the CPE string and corresponds to Camel 4 releases shipped by Red Hat.

Risk and Exploitability

The CVSS score of 5.9 indicates a moderate severity, while the EPSS score of less than 1% shows a very low likelihood of exploitation at present. The flaw is not listed in the CISA KEV catalog. Exploitation would require an attacker to reach the application over a network and supply a custom OCSP response; no exploitation preconditions beyond this are documented. In the absence of an official fix, monitoring for malformed OCSP traffic is recommended.

Generated by OpenCVE AI on September 19, 2026 at 20:15 UTC.

Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.


OpenCVE Recommended Actions

  • Check for and apply any available update to the Red Hat build of Apache Camel for Spring Boot 4 that addresses the Netty OCSP validation issue.
  • If a patch is not yet released, configure the application to reject OCSP responses missing the nextUpdate field or temporarily disable OCSP validation for critical connections.
  • Implement network monitoring or filtering to detect and block suspicious OCSP responses that omit required fields.

Generated by OpenCVE AI on September 19, 2026 at 20:15 UTC.

Tracking

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Advisories

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History

Sun, 20 Sep 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 19 Sep 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Apache Camel For Spring Boot
Vendors & Products Redhat build Of Apache Camel For Spring Boot

Fri, 18 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Fri, 18 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Title Netty: netty-handler-ssl-ocsp: io.netty/netty-handler-ssl-ocsp: netty: ocsp validation silently skipped when a response omits the optional nextupdate field Io.netty/netty-handler-ssl-ocsp: netty: ocsp validation silently skipped when a response omits the optional nextupdate field

Fri, 18 Sep 2026 11:00:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'}


Fri, 18 Sep 2026 08:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Netty: netty-handler-ssl-ocsp: io.netty/netty-handler-ssl-ocsp: netty: ocsp validation silently skipped when a response omits the optional nextupdate field
First Time appeared Redhat
Redhat camel Spring Boot
Weaknesses CWE-299
CPEs cpe:/a:redhat:camel_spring_boot:4
Vendors & Products Redhat
Redhat camel Spring Boot
References

Subscriptions

Redhat Build Of Apache Camel For Spring Boot Camel Spring Boot
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-18T14:41:59.585Z

Reserved: 2026-09-18T07:17:42.853Z

Link: CVE-2026-93493

cve-icon Vulnrichment

Updated: 2026-09-18T14:37:06.373Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T08:17:02.523

Modified: 2026-09-18T19:06:08.407

Link: CVE-2026-93493

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-10T00:41:42Z

Links: CVE-2026-93493 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T22:30:00Z

Weaknesses
  • CWE-299

    Improper Check for Certificate Revocation