CVE-2026-43633

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Source

https://cve.org/CVERecord?id=CVE-2026-43633

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43633.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-43633

Published

2026-05-19T13:29:55.780Z

Modified

2026-07-08T08:13:28.225289152Z

Severity

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

Summary

HestiaCP 1.9.0-1.9.4 Deserialization RCE via Web Terminal

Details

HestiaCP versions 1.9.0 through 1.9.4 contain a deserialization vulnerability in the web terminal component caused by a session format mismatch between PHP and Node.js that allows unauthenticated remote attackers to achieve root-level code execution. Attackers can inject crafted data into HTTP headers that are processed by the PHP session handler but incorrectly deserialized by the Node.js web terminal component as trusted session values, resulting in arbitrary command execution on systems with the web terminal feature enabled.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43633.json",
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-502"
    ]
}

References

Affected packages

Git / github.com/hestiacp/hestiacp

Affected ranges

Type

GIT

Repo

https://github.com/hestiacp/hestiacp

Events

Introduced

1708dd971fd1e9d49a5f9ead6d0ba103e15ac45c

Fixed

aae8b2b40bf78fe571d12d49f3a2e5b5ada7d38e

Fixed

854d71b3c1737b0a0d0cc55c926008ffe1f6719b

Database specific

{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "1.9.0"
        },
        {
            "fixed": "1.9.4"
        }
    ]
}

Affected versions

1.*

1.9.0

1.9.1

1.9.2

1.9.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43633.json"