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SCA: security update for io.netty:netty-handler-ssl-ocsp (GHSA-g7hg-vrcf-mvmr)

high Tenable Self-Hosted Container Security Plugin ID 445178

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and
 4.2.16.Final, the OcspServerCertificateValidator flags an out-of-date OCSP response but does not stop
 processing it, so an expired GOOD response is still reported as VALID, letting an on-path attacker replay
 a stale GOOD response to bypass revocation of a since-revoked certificate. Exploitation can lead to
 certificate revocation bypass via replay of an expired OCSP response. Any application using
 OcspServerCertificateValidator is affected; a revoked certificate can be accepted. This issue has been
 fixed in versions 4.1.136.Final and 4.2.16.Final. (CVE-2026-56821)

Solution

Update the io.netty:netty-handler-ssl-ocsp library and its related packages to version 4.1.136.Final or later.

See Also

https://github.com/advisories/GHSA-g7hg-vrcf-mvmr

Plugin Details

Severity: High

ID: 445178

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 7/23/2026

Updated: 8/7/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.61

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-56821

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/22/2026

Vulnerability Publication Date: 7/22/2026

Reference Information

CVE: CVE-2026-56821

cwe: CWE-299