CVE Explorer
CVE-2026-2859
Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows unauthenticated users to enumerate existing hosts by observing different HTTP response codes in deploy_agent endpoint, which could lead to information disclosure.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Checkmk","vendor":"Checkmk GmbH","versions":[{"lessThan":"2.4.0p23","status":"affected","version":"2.4.0","versionType":"semver"},{"lessThan":"2.3.0p43","status":"affected","version":"2.3.0","versionType":"semver"},{"status":"affected","version":"2.2.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:1d4f7db7aba7d9f5d0cfb3c85263ded87ba2a0417c92bdd6dc0da0289721120a · sha256:cd9ab97bd9ad7054… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:1d4f7db7aba7d9f5d0cfb3c85263ded87ba2a0417c92bdd6dc0da0289721120a · sha256:cd9ab97bd9ad7054… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-204","description":"CWE-204: Observable Response Discrepancy","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:1d4f7db7aba7d9f5d0cfb3c85263ded87ba2a0417c92bdd6dc0da0289721120a · sha256:cd9ab97bd9ad7054… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://checkmk.com/werk/18994"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1d4f7db7aba7d9f5d0cfb3c85263ded87ba2a0417c92bdd6dc0da0289721120a · sha256:cd9ab97bd9ad7054… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.