CVE-2026-4881

MEDIUM

Octopus Server 2023.0.0-2025.4.10522, 2025.4.0-2025.4.10544, 2026.1.0-2026.1.11312 - Privilege Escalation via API

Title source: llm

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.

References (1)

Core 1

Core References

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

Scores

CVSS v4 6.0

EPSS 0.0035

EPSS Percentile 26.7%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-862

Status published

Products (3)

Octopus Deploy/Octopus Server 2023.0.0 - 2025.4.10523

Octopus Deploy/Octopus Server 2025.4.0 - 2025.4.10545

Octopus Deploy/Octopus Server 2026.1.0 - 2026.1.11313

Published Jun 04, 2026

Tracked Since Jun 04, 2026