Dashboard / CVE-2026-43633

CVE-2026-43633

CRITICAL
INFO Priority: 0.10 BB Relevance: 79/100
Published: 2026-05-19 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: Present
VC: High
VI: High
VA: High

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
hestiacp hestiacp 1.9.0

References & Advisories (5)

Bug Bounty Relevance

79 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.5 / 10.0 v4.0
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

EPSS — Exploitation Probability

1.07%
Raw Score 0.010720
Percentile 65.4%
Date 2026-11-13

EPSS Trend

2026-11-13
0.01072
2026-11-12
0.01072
2026-11-10
0.01072
2026-11-09
0.01072
2026-11-08
0.01072

Intelligence Sources

mitre ref →

External Links