What is CVE-2026-33396?

CVE-2026-33396 is a critical-severity vulnerability in Oneuptime, classified under OS Command Injection. CVSS score: 10.0/10. Published 2026-03-26.

How severe is CVE-2026-33396?

Critical severity. CVSS v3 base score is 10.0 out of 10.

RCE in Oneuptime

CVE-2026-33396

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.35, a low-privileged authenticated user (ProjectMember) can achieve remote command execution on the Probe container/host by abusing Synthetic Monitor…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.011 (78.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Oneuptime — versions < 10.0.35

Weakness classification (CWE)

References

https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg (x_refsource_CONFIRM)
https://github.com/OneUptime/oneuptime/commit/e8e4ee3ff0740eb131045ab3d67453141c46178a (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33396?: CVE-2026-33396 is a critical-severity vulnerability in Oneuptime, classified under OS Command Injection. CVSS score: 10.0/10. Published 2026-03-26.
How severe is CVE-2026-33396?: Critical severity. CVSS v3 base score is 10.0 out of 10.