CVE-2026-4881

CVSS 6 MEDIUMEPSS 0.2%CWE-862

In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

Octopus Deploy · Octopus Server

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References

https://advisories.octopus.com/post/2026/sa2026-04