CVE-2025-64998
High
Description
Exposure of session signing secret in Checkmk <2.4.0p23, <2.3.0p45 and 2.2.0 allows an administrator of a remote site with config sync enabled to hijack sessions on the central site by forging session cookies.
SeverityHigh
CVSS7.2
Exploit probability—
ProductCheckmk
PublishedMar 24, 2026
First seenMar 24, 2026
Weakness typeCWE-522CWE-522
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| checkmk checkmk | 2.2.0, 2.3.0, 2.4.0 | — |
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