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Octopus Server EUVDEUVD-2026-12544

| CVE-2026-3237 LOW
Improper Authorization (CWE-285)
2026-03-17 Octopus
2.3
CVSS 4.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V14 - Configuration Dependency management, component inventory
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS 2.3. EPSS 0.0%. No patch confirmed.

Exploit ScenarioDerived

An attacker could exploit this vulnerability in affected to compromise the security of affected deployments, potentially impacting confidentiality, integrity, or availability.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 17, 2026

A security vulnerability in affected (CVSS 2.3). Remediation should follow standard vulnerability management procedures.

Earlier versions of this analysis (1)
v1 Mar 17, 2026 - 08:13 CVSS 2.3

In affected versions of Octopus Server it was possible for a low privileged user to manipulate an API request to change the signing key expiration and revocation time frames via an API endpoint that h

RemediationAI

Monitor vendor channels for patch availability.

Affected VersionsENISA

Octopus Server 2023.0.0 <2025.3.14731
Octopus Server 2025.4.0 <2025.4.10359
Octopus Server 2026.1.0 <2026.1.5571

Affected Packages

euvd octopus_server fix: 2025.3.14731, 2025.4.10359, 2026.1.5571

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-285 (Improper Authorization). Affects affected.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 2.3 LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

2
Patch available
Apr 16, 2026 - 05:29 EUVD
2025.3.14731,2025.4.10359,2026.1.5571
CVE Published
Mar 17, 2026 - 06:37 nvd
LOW 2.3

DescriptionCVE.org

In affected versions of Octopus Server it was possible for a low privileged user to manipulate an API request to change the signing key expiration and revocation time frames via an API endpoint that had incorrect permission validation. It was not possible to expose the signing keys using this vulnerability.

Executive ViewAI

Why It Matters

CVE-2026-3237 is a low-severity vulnerability in affected (CVSS 2.3). The limited severity suggests constrained impact, typically requiring specific conditions or local access for exploitation. Apply vendor updates when available as part of routine maintenance.

Business Impact: Low
Compensating Controls

Apply vendor patch during routine maintenance. Standard security controls provide adequate interim protection.

Threat Intelligence Overview

EPSS Score
0.0%
Top 88% exploitable
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity LOW
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

12
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +12
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

CVE-2018-18850 HIGH POC
8.8 Oct 31

In Octopus Deploy 2018.8.0 through 2018.9.x before 2018.9.1, an authenticated user with permission to modify deployment

CVE-2019-11632 HIGH POC
8.1 May 01

In Octopus Deploy 2019.1.0 through 2019.3.1 and 2019.4.0 through 2019.4.5, an authenticated user with the VariableViewUn

CVE-2026-4881 MEDIUM POC
6.0 Jun 04

Server-level configuration changes can be made by any authenticated low-privilege user in Octopus Server through a speci

CVE-2022-2572 CRITICAL
9.8 Nov 01

In affected versions of Octopus Server where access is managed by an external authentication provider, it was possible t

CVE-2022-2778 CRITICAL
9.8 Sep 30

In affected versions of Octopus Deploy it is possible to bypass rate limiting on login using null bytes. Rated critical

CVE-2018-11320 CRITICAL
9.8 May 21

In Octopus Deploy 2018.4.4 through 2018.5.1, Octopus variables that are sourced from the target do not have sensitive va

CVE-2026-0704 CRITICAL
9.1 Feb 25

Path traversal in Octopus Deploy allows removing files and file contents on the host through API manipulation. Enables d

CVE-2022-2782 CRITICAL
9.1 Oct 27

In affected versions of Octopus Server it is possible for a session token to be valid indefinitely due to improper valid

CVE-2026-92355 HIGH
8.7 Sep 16

Path traversal in Octopus Server allows an authenticated low-privilege user to overwrite arbitrary files on the server f

CVE-2026-101169 HIGH
8.7 Sep 29

Authenticated remote code execution in Octopus Server allows any user whose role grants permission to edit an Environmen

CVE-2026-102478 HIGH
8.7 Oct 07

Privilege escalation in Octopus Server lets an authenticated user who already holds permission to modify roles weaken a

CVE-2026-102488 HIGH
8.7 Oct 08

Incorrect authorization in Octopus Server causes the platform to evaluate multiple scoped permission assignments incorre

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