CVE-2026-91778

State: Published
Severity: 7.2 High
Published: Sep 15, 2026
Updated: Sep 15, 2026
Reserved: Sep 15, 2026

Description

In affected versions of Octopus Server, users with certain scoped permission sets could execute arbitrary scripts on a worker (including the Octopus Server built-in worker). Incorrect permission validation during script execution would allow the script to execute without the user possessing the required authorisation.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N	Octopus

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
Octopus ServerOctopus Deploy	2019.0.0 to before 2026.1.11725Affected 2026.2.0 to before 2026.2.13344Affected 2026.3.0 to before 2026.3.11816Affected

References

https://advisories.octopus.com/post/2026/sa2026-08

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