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Echo: io.netty:netty-handler-ssl-ocsp, netty-handler-ssl-ocsp: security update to 4.1.136.Final

critical Tenable Self-Hosted Container Security Plugin ID 462608

Description

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

 - Netty is a network application framework for development of protocol servers and clients. In versions
 4.2.0.Final through 4.2.15.Final and prior to 4.1.135.Final, `OcspClient` does not validate that the
 `CertificateID` in an OCSP response matches the requested `CertificateID`, which can lead to replay
 attack. `OcspClient.validateResponse` accepts a legitimately signed `GOOD` status response for an
 unrelated certificate issued by the same CA, allowing bypass of revocation checks for another certificate.
 This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. (CVE-2026-56820)

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://advisory.echohq.com/cve/CVE-2026-56820

Plugin Details

Severity: Critical

ID: 462608

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.61

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-56820

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/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: 9/28/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-56820