How severe is CVE-2026-3237?

CVE-2026-3237 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-3237 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3237?

CVE-2026-3237 affects Octopus Octopus Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3237?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3237 have an EU (EUVD) identifier?

Yes. CVE-2026-3237 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12544.

When was CVE-2026-3237 published?

CVE-2026-3237 was published on 2026-03-17 and last updated on 2026-06-17.

CVE-2026-3237

CVE-2026-3237 is a medium-severity vulnerability in Octopus Octopus Server with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 2.3
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12544
Weakness: CWE-285
Affected product: Octopus Octopus Server
Published: 2026-03-17
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-3237?: 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.
How severe is CVE-2026-3237?: CVE-2026-3237 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-3237 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3237?: CVE-2026-3237 affects Octopus Octopus Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3237?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3237 have an EU (EUVD) identifier?: Yes. CVE-2026-3237 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12544.
When was CVE-2026-3237 published?: CVE-2026-3237 was published on 2026-03-17 and last updated on 2026-06-17.

References

https://advisories.octopus.com/post/2026/sa2026-03

Affected products (1)

cpe:2.3:a:octopus:octopus_server:*:*:*:*:*:*:*:*

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