CVE-2026-4881 | BDVDB-2026-337573 Detail

Octopus DeployOctopus Server

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.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-862 Missing Authorization

References#

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

Exploit#

No public exploit known

History#

Version 12026-06-04Record published in the CVE List.

Published

Published: 2026-06-04
Last modified: 2026-06-04

Vendor information

Vendor: Octopus Deploy
Product: Octopus Server

All Octopus Deploy vulnerabilities

Score

6.0 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 11.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Missing Authorization

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2023.0.0 and < 2025.4.10523
Fixed
2025.4.10523
Vulnerable
>= 2025.4.0 and < 2025.4.10545
Fixed
2025.4.10545
Vulnerable
>= 2026.1.0 and < 2026.1.11313
Fixed
2026.1.11313

Scoring System

CVSS v4.0

6.0 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	Present
Privileges Required	Low
User Interaction	None
Vulnerable System Confidentiality	None
Vulnerable System Integrity	None
Vulnerable System Availability	High
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).