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CVE-2026-118965— Path traversal in host label synchronization allows code execution on the central site from a remote site

Quick assessment

Affected
Checkmk GmbH Checkmk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Checkmk 2.5.0p19 以下版本、2.4.0p40 以下版本以及已停止维护的 2.3.0 版本中，发现主机标签同步功能存在路径遍历漏洞。在分布式监控环境中，若攻击者能够控制远程站点，则可在中央站点上写入任意文件，进而以中央站点用户的身份执行恶意代码。

CVSS 9.4 · Critical
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I. Basic Information for CVE-2026-118965

Vulnerability Information
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Vulnerability Title
Path traversal in host label synchronization allows code execution on the central site from a remote site
Source: CVE Program / CVE List V5
Vulnerability Description
Path traversal in the discovered host label synchronization in Checkmk <2.5.0p19, <2.4.0p40 and 2.3.0 (EOL) allows an attacker in control of a remote site in a distributed monitoring setup to write arbitrary files on the central site and thereby execute code as the central site user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Checkmk GmbH Checkmk 2.5.0 ~ 2.5.0p19 -

II. Public POCs for CVE-2026-118965

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III. Intelligence Information for CVE-2026-118965

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Other References for CVE-2026-118965 (1)

Same Patch Batch · Checkmk GmbH · 2026-11-11 · 3 CVEs total

CVE-2026-121374 9.4 CRITICAL Arbitrary file write and code execution via excluded node roles in Kubernetes special agen
CVE-2026-120495 9.4 CRITICAL Arbitrary file write and code execution via crafted Synthetic Monitoring agent data

IV. Related Vulnerabilities

Same product: Checkmk
Same vendor: Checkmk GmbH
Same weakness: CWE-22