CVE-2026-3236: In affected versions of Octopus Server it was possible to create a new API key from an existing access token r

Routine

MEDIUM 4.3UPGRADE

CVE-2026-3236 is a medium-severity flaw (CVSS 4.3) affecting octopus server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In affected versions of Octopus Server it was possible to create a new API key from an existing access token resulting in the new API key having a lifetime exceeding the original API key used to mint the access token.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-03-05
Last modified	2026-06-17

Publisher (CNA): Octopus Deploy · Vendor: octopus

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-05 11:15 UTCPublished CVE record published
2026-06-17 10:43 UTCUpdated Record last modified

octopus octopus server UPGRADE

Affected: >= 2023.1.4189 and < 2025.3.14761 · >= 2025.4.51 and < 2025.4.10409

Fixed in: 2025.3.14761, 2025.4.10409

Safe to downgrade to: a release before 2023.1.4189

1. Check installed version

apt-cache policy octopus-server || rpm -q octopus-server || octopus-server --version

2. UPGRADE to 2025.3.14761 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade octopus-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade octopus-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2023.1.4189 (Debian / Ubuntu)

apt-cache madison octopus-server sudo apt install octopus-server=<VERSION_BEFORE_2023.1.4189> sudo apt-mark hold octopus-server

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list octopus-server sudo dnf downgrade octopus-server-<VERSION_BEFORE_2023.1.4189> sudo dnf versionlock add octopus-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3236?

octopus server: upgrade to 2025.3.14761, 2025.4.10409. Exact commands for each OS are on this page.

Is CVE-2026-3236 being exploited?

CVE-2026-3236 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3236 affect?

CVE-2026-3236 affects octopus server. Severity is medium (CVSS 4.3). In affected versions of Octopus Server it was possible to create a new API key from an existing access token resulting in the new API key having a lifetime exceeding the original API key used to mint the access token.

How urgent is CVE-2026-3236?

Priority 16/100. No elevated risk signals yet.

Related CVEs

CVE-2026-12702 MEDIUM 4.9 UPGRADE In affected versions of Octopus Deploy Insufficient checks on the project trigger actions allows an unauthoriz
CVE-2026-14163 HIGH 7.5 UPGRADE In affected versions of Octopus Server under certain circumstances it is possible for sensitive variables to b
CVE-2026-4881 MEDIUM 6.5 UPGRADE In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated
CVE-2026-3237 MEDIUM 4.3 UPGRADE In affected versions of Octopus Server it was possible for a low privileged user to manipulate an API request
CVE-2026-0704 CRITICAL 9.1 UPGRADE In affected version of Octopus Deploy it was possible to remove files and/or contents of files on the host usi

References

← Back to latest CVEs