製品・ソフトウェアに関する情報
Vulnerability Search
Check MKにおけるクロスサイトスクリプティングの脆弱性
Title Check MKにおけるクロスサイトスクリプティングの脆弱性
Summary

Checkmkのバージョン2.5.0p5未満、2.4.0p31未満、2.3.0p48未満およびすべての2.2.0バージョンには、サービスディスカバリーのアクティブチェック出力に保存型クロスサイトスクリプティングの脆弱性があります。これにより、アクティブチェックまたはカスタムチェックの設定が可能な管理者が悪意のあるHTMLまたはJavaScriptをチェック出力に注入でき、そのコードはサービスディスカバリー画面でチェックを実行する管理者やホストの読み取り権限を持つユーザーのブラウザ上で実行されます。

Possible impacts ・当該ソフトウェアが扱う情報の一部が外部に漏れる可能性があります。 ・当該ソフトウェアが扱う情報の一部が書き換えられる可能性があります。 ・当該ソフトウェアは停止しません。 
Solution

ベンダ情報を参照して適切な対策を実施してください。

Publication Date June 8, 2026, midnight
Registration Date June 9, 2026, 2:12 p.m.
Last Update June 9, 2026, 2:12 p.m.
CVSS3.0 : 警告
Score 4.8
Vector CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Affected System
Check MK
Check MK 2.2.0
Check MK 2.3.0
Check MK 2.4.0
Check MK 2.5.0
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
Change Log
No Changed Details Date of change
1 [2026年06月09日]
  掲載		 June 9, 2026, 2:12 p.m.
NVD Vulnerability Information
CVE-2026-9549
Summary

Stored cross-site scripting in the service discovery active check output in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an administrator who can configure active or custom checks to inject malicious HTML or JavaScript into check output that executes in the browser of an admin or a user with host read permissions when they run the check on the service discovery page.

Publication Date June 8, 2026, 10:16 p.m.
Registration Date June 9, 2026, 4:14 a.m.
Last Update June 9, 2026, 12:53 a.m.
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:a:checkmk:checkmk:2.2.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b1:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.2.0:p9:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:b6:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p14:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p22:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p25:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p28:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p31:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p33:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p35:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.3.0:p36:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p39:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.3.0:p43:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.4.0:-:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.4.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p1:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.4.0:p11:*:*:*:*:*:*
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cpe:2.3:a:checkmk:checkmk:2.4.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p16:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p17:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p18:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p19:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p20:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p21:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p22:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p23:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p24:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p25:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p26:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p27:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p28:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p29:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p30:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p7:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p8:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p9:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.5.0:p4:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List