CVE-2026-33455 | Checkmk up to 2.5.0b3 Monitoring Quicksearch delimiter

VDB-356807 · CVE-2026-33455 · WID-SEC-2026-1050 CHECKMK UP TO 2.5.0B3 MONITORING QUICKSEARCH DELIMITER HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 1.88 Summaryinfo A vulnerability has been found in Checkmk up to 2.5.0b3 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Monitoring Quicksearch. The manipulation leads to delimiter. This vulnerability is uniquely identified as CVE-2026-33455. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded. Detailsinfo A vulnerability, which was classified as critical, has been found in Checkmk up to 2.5.0b3. This issue affects an unknown part of the component Monitoring Quicksearch. The manipulation with an unknown input leads to a delimiter vulnerability. Using CWE to declare the problem leads to CWE-140. The product does not neutralize or incorrectly neutralizes delimiters. Impacted is confidentiality, integrity, and availability. The summary by CVE is: Livestatus injection in the monitoring quicksearch in Checkmk <2.5.0b4 allows an authenticated attacker to inject livestatus commands via the search query due to insufficient input sanitization in search filter plugins. It is possible to read the advisory at checkmk.com. The identification of this vulnerability is CVE-2026-33455 since 03/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. Upgrading to version 2.5.0b4 eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1050). Affected Checkmk Checkmk Productinfo Name Checkmk Version 2.5.0b3 CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Delimiter CWE: CWE-140 / CWE-20 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Checkmk 2.5.0b4 Timelineinfo 03/20/2026 CVE reserved 04/10/2026 +20 days Advisory disclosed 04/10/2026 +0 days VulDB entry created 04/10/2026 +0 days VulDB entry last update Sourcesinfo Advisory: checkmk.com Status: Confirmed CVE: CVE-2026-33455 (🔒) GCVE (CVE): GCVE-0-2026-33455 GCVE (VulDB): GCVE-100-356807 CERT Bund: WID-SEC-2026-1050 - Checkmk: Mehrere Schwachstellen Entryinfo Created: 04/10/2026 11:24 Updated: 04/10/2026 13:44 Changes: 04/10/2026 11:24 (65), 04/10/2026 13:44 (7) Complete: 🔍 Cache ID: 99:C31:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸