Is CVE-2026-8296 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-8296 being exploited in the wild.

How severe is CVE-2026-8296?

Informational severity, with a CVSS score of 5.6, published 19 June 2026.

Which products and versions are affected?

Octopus Deploy Octopus Server 2023.x, 2024.x, 2025.1.x - 2025.3.x, 2025.4.x before 2025.4.10678, 2026.1.x before 2026.1.11451, 2026.2.x before 2026.2.13114.

Is there a fix for CVE-2026-8296?

A patch was published on 2026-05-12: Patch release date Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-8296 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-8296?

Check whether you run Octopus Deploy Octopus Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-8296: Octopus Deploy Octopus Server stored XSS in artifacts

CVE-2026-8296 · Severity: info · CVSS 5.6 · Published 2026-06-19

Octopus Server, a platform used for automating software deployments, is affected by a security vulnerability that allows users with specific access levels to inject malicious scripts into system artifacts. If an administrator or another user views these compromised artifacts, the script could execute in their browser, potentially leading to unauthorized actions or data access. Organizations should upgrade to the latest patched versions to prevent this risk.

Technologies: Octopus Deploy Octopus Server. Vendors: Octopus Deploy.

Quick answers

Is CVE-2026-8296 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-8296 being exploited in the wild.
How severe is CVE-2026-8296?: Informational severity, with a CVSS score of 5.6, published 19 June 2026.
Which products and versions are affected?: Octopus Deploy Octopus Server 2023.x, 2024.x, 2025.1.x - 2025.3.x, 2025.4.x before 2025.4.10678, 2026.1.x before 2026.1.11451, 2026.2.x before 2026.2.13114.
Is there a fix for CVE-2026-8296?: A patch was published on 2026-05-12: Patch release date Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-8296 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-8296?: Check whether you run Octopus Deploy Octopus Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stored cross-site scripting (XSS) vulnerability exists in Octopus Server within the artifacts component. An attacker with high privileges (PR:H) can embed a malicious payload into an artifact. The vulnerability is triggered when another user, typically an administrator, interacts with the affected artifact in their web browser. While the attack requires high privileges and user interaction, it can lead to a high impact on confidentiality (VC:H) within the application session. Patches have been released in versions 2025.4.10678, 2026.1.11451, and 2026.2.13114.

Affected products

Octopus Deploy Octopus Server 2023.x, 2024.x, 2025.1.x - 2025.3.x, 2025.4.x before 2025.4.10678, 2026.1.x before 2026.1.11451, 2026.2.x before 2026.2.13114

Timeline

2026-03-19: other: Vulnerability discovered
2026-05-12: patched: Patch release date
2026-06-11: advisory: Internal advisory published
2026-06-19: disclosed: CVE published to NVD

References

https://advisories.octopus.com/post/2026/sa2026-05

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