Vulnerability · Published Sep 15, 2026 · Assigned by Octopus
CVE-2026-91778
High 7.2
In plain English
A high-severity incorrect authorization in Octopus Server from Octopus Deploy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 4.0)7.2High
Exploit odds (30 days)0.4%top 62.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Octopus Deploy | Octopus Server | 2019.0.0 – before 2026.1.117252026.2.0 – before 2026.2.133442026.3.0 – before 2026.3.11816 |
Weakness: CWE-863 · Vector: 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