Vulnerability · Published Jun 4, 2026 · Assigned by Octopus
CVE-2026-4881
Medium 6.0
In plain English
A medium-severity missing 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 0.2% (higher than 11% of all known vulnerabilities).
Severity (CVSS 4.0)6.0Medium
Exploit odds (30 days)0.2%top 88.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Octopus Deploy | Octopus Server | 2023.0.0 – before 2025.4.105232025.4.0 – before 2025.4.105452026.1.0 – before 2026.1.11313 |
Weakness: CWE-862 · Vector: 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