CVE-2026-86231

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Source

https://cve.org/CVERecord?id=CVE-2026-86231

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86231.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-86231

Published

2026-09-06T22:45:12Z

Modified

2026-09-08T08:17:41Z

Severity

2.9 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P CVSS Calculator

Summary

mwiede jsch KnownHosts.java getRevokedKeys improper check for certificate revocation

Details

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.

Database specific

{
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-298",
        "CWE-299"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86231.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "2.28.2"
                },
                {
                    "last_affected": "2.28.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/mwiede/jsch

Affected ranges

Type

GIT

Repo

https://github.com/mwiede/jsch

Events

Introduced

f3e25918044a3ff072158839bc9b379d36e8e11d

Fixed

194a2f76a5c0f1c3f778565be3fd66bcafc42d23

Fixed

af06a9f78a7416442b5ce94774afd9862a2142c4

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "2.28.0"
        },
        {
            "last_affected": "2.28.0"
        },
        {
            "introduced": "2.28.1"
        },
        {
            "last_affected": "2.28.1"
        },
        {
            "introduced": "2.28.3"
        },
        {
            "last_affected": "2.28.3"
        },
        {
            "introduced": "2.28.4"
        },
        {
            "last_affected": "2.28.4"
        },
        {
            "introduced": "2.28.5"
        },
        {
            "last_affected": "2.28.5"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

2.*

2.28.0

2.28.1

2.28.3

2.28.4

2.28.5

jsch-2.*

jsch-2.28.0

jsch-2.28.4

jsch-2.28.5

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86231.json"

vanir_signatures

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        "signature_version": "v1",
        "source": "https://github.com/mwiede/jsch/commit/194a2f76a5c0f1c3f778565be3fd66bcafc42d23",
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]

vanir_signatures_modified

"2026-09-08T08:17:41Z"