CVE-2022-45047Network attack vector

Arbitrary object instantiation via host-key deserialization

Published Nov 16, 2022 · Updated May 1, 2026

Unsafe deserialization in Apache MINA SSHD 2.9.1 and earlier allows attackers to instantiate classes through a crafted host-key file. SimpleGeneratorHostKeyProvider passes the file stream to ObjectInputStream.readObject without restricting resolved classes, then casts the result to KeyPair. Exposure requires an application to select this optional provider and load an attacker-influenced host-key file; downstream effects depend on classes available to the application.

CVSS severity9.8
Critical
EPSS probability3.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Apache MINA SSHD 2.9.1 and earlier allows attackers to instantiate classes through a crafted host-key file. SimpleGeneratorHostKeyProvider passes the file stream to ObjectInputStream.readObject without restricting resolved classes, then casts the result to KeyPair. Exposure requires an application to select this optional provider and load an attacker-influenced host-key file; downstream effects depend on classes available to the application.

The record

CVE
CVE-2022-45047
Published
Nov 16, 2022
Updated
May 1, 2026
Vendor
The Apache Software Foundation
Product
Apache MINA SSHD
Classifications
CWE-502
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 16, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=2.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache MINA SSHDversion=unspecified <=2.9.1

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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