VDB-368292 · CVE-2026-4881 · WID-SEC-2026-1784

Octopus Deploy Octopus Server up to 2025.4.10522/2025.4.10544/2026.1.11312 API Endpoint permission

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Octopus Deploy Octopus Server up to 2025.4.10522/2025.4.10544/2026.1.11312. Affected by this issue is some unknown functionality of the component API Endpoint. The manipulation results in permission. This vulnerability is reported as CVE-2026-4881. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Octopus Deploy Octopus Server up to 2025.4.10522/2025.4.10544/2026.1.11312. Affected is an unknown functionality of the component API Endpoint. The manipulation with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was disclosed by Mononclemich. The advisory is shared for download at advisories.octopus.com. This vulnerability is traded as CVE-2026-4881 since 03/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1222.

Upgrading to version 2025.4.10523, 2025.4.10545 or 2026.1.11313 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1784). Once again VulDB remains the best source for vulnerability data.

Affected

Octopus Deploy Octopus Deploy

Productinfo

Vendor

Octopus Deploy

Name

Octopus Server

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Permission
CWE: CWE-275 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Octopus Server 2025.4.10523/2025.4.10545/2026.1.11313

Timelineinfo

03/26/2026 CVE reserved
06/04/2026 +69 days Advisory disclosed
06/04/2026 +0 days VulDB entry created
06/04/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: advisories.octopus.com
Researcher: Mononclemich
Status: Confirmed

CVE: CVE-2026-4881 (🔒)
GCVE (CVE): GCVE-0-2026-4881
GCVE (VulDB): GCVE-100-368292
CERT Bund: WID-SEC-2026-1784 - Octopus Deploy: Schwachstelle ermöglicht Manipulation

Entryinfo

Created: 06/04/2026 12:38
Updated: 06/04/2026 15:12
Changes: 06/04/2026 12:38 (68), 06/04/2026 15:12 (7)
Complete: 🔍
Cache ID: 216::103