CVE-2026-3236Network attack vector

Persistent API access via uncapped key lifetime

Published Mar 5, 2026 · Updated Mar 5, 2026

Incorrect authorization in Octopus Deploy Octopus Server allows remote authenticated users to create an overlong-lived API key. The API-key creation path accepts an existing access token but fails to cap the new key's lifetime at that of the API key that minted the token. A valid access token is required; the resulting credential retains the user's authorized API access after the originating key expires.

CVSS severity2.3
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect authorization in Octopus Deploy Octopus Server allows remote authenticated users to create an overlong-lived API key. The API-key creation path accepts an existing access token but fails to cap the new key's lifetime at that of the API key that minted the token. A valid access token is required; the resulting credential retains the user's authorized API access after the originating key expires.

The record

CVE
CVE-2026-3236
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
Octopus Deploy
Product
Octopus Server
Classifications
CWE-863, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2023.0.0 <2025.3.14761
  2. Affected versionversion=2025.4.0 <2025.4.10409

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Octopus Deploy · Octopus Serverversion=2023.0.0 <2025.3.14761; version=2025.4.0 <2025.4.10409

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
2.3Octopus DeployCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo