Medium severityNVD Advisory· Published Sep 21, 2026· Updated Sep 21, 2026
CVE-2026-77021
CVE-2026-77021
Description
Improper handling of highly compressed data (data amplification) in Checkmk <2.5.0p14, <2.4.0p37, <2.3.0p51 and 2.2.0 (EOL) allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an arbitrary size.
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Affected products
1Patches
Vulnerability mechanics
References
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