Vulnerability · Published Sep 18, 2026 · Assigned by redhat

CVE-2026-93493Io.netty/netty-handler-ssl-ocsp: netty: ocsp validation silently skipped when a response omits the optional nextupdate field

Medium 5.9

In plain English

A medium-severity security flaw in Red Hat build of Apache Camel for Spring Boot 4 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.2%top 87.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	netty	no fix listed	DEBIAN-CVE-2026-93493
Debian:13	netty	no fix listed	DEBIAN-CVE-2026-93493
Debian:14	netty	no fix listed	DEBIAN-CVE-2026-93493
Ubuntu:26.10	netty	no fix listed	UBUNTU-CVE-2026-93493

Affected products (as reported)

Vendor	Product	Versions
Red Hat	Red Hat build of Apache Camel for Spring Boot 4	see references

Weakness: CWE-299 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

https://access.redhat.com/security/cve/CVE-2026-93493 vdb-entry, x_refsource_REDHAT
RHBZ#2536897 issue-tracking, x_refsource_REDHAT