Public mode

No access to your tenant or devices. Every item links to its source. What this means

CVE-2026-86231

mwiede jsch KnownHosts.java getRevokedKeys improper check for certificate revocation

CVSS 4.0 6.3 MEDIUMCVSS 3.1 3.7 LOWCVSS 3.0 3.7 LOWCVSS 2.0 2.6 Check source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-86231

Published

A security flaw has been discovered in mwiede jsch up to 2.28.5. Affected is the function getRevokedKeys of the file src/main/java/com/jcraft/jsch/KnownHosts.java. Performing a manipulation of the argument known_hosts results in improper check for certificate revocation. The attack is possible to be carried out remotely. The attack is considered to have high complexity. The exploitability is told to be difficult. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.28.6 is able to address this issue. The patch is named 194a2f76a5c0f1c3f778565be3fd66bcafc42d23. You should upgrade the affected component.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86231

Published

jsch

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "mwiede",
                    "product": "jsch",
                    "versions": [
                        {
                            "version": "2.28.0",
                            "status": "affected"
                        },
                        {
                            "version": "2.28.1",
                            "status": "affected"
                        },
                        {
                            "version": "2.28.2",
                            "status": "affected"
                        },
                        {
                            "version": "2.28.3",
                            "status": "affected"
                        },
                        {
                            "version": "2.28.4",
                            "status": "affected"
                        },
                        {
                            "version": "2.28.5",
                            "status": "affected"
                        },
                        {
                            "version": "2.28.6",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:mwiede:jsch:*:*:*:*:*:*:*:*"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON