CVE-2026-93493
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.
Statement
This vulnerability is rated Moderate because it allows a remote attacker to bypass certificate validation in applications using Netty's OCSP validator. By providing a specially crafted OCSP response that omits the optional nextUpdate field, an attacker can cause the validation process to silently fail, leading to the acceptance of an unvalidated certificate. This issue primarily affects applications within the Red Hat build of Apache Camel that explicitly utilize the OcspServerCertificateValidator component, potentially compromising the integrity of TLS connections.
Mitigation
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.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.9 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | High | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
Trust may be assigned to an entity who is not who it claims to be.
Integrity,Other
Technical Impact: Other
Data from an untrusted (and possibly malicious) source may be integrated.
Confidentiality
Technical Impact: Read Application Data
Data may be disclosed to an entity impersonating a trusted entity, resulting in information disclosure.
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