CVSS 4.0
8.7 highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE-2026-116835 octopus deploy octopus server
High (8.7) in octopus deploy octopus server. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
In affected versions of Octopus Server, insufficient validation of custom claims on OIDC accounts allowed a user with permission to edit accounts to cause Octopus Server to issue signed OIDC tokens that impersonate a different project. This could grant access to external systems, such as cloud providers or other Octopus instances, that trust that project's identity.
Severity
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 16th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
- OWASP Top 10
- A08:2025 Software or Data Integrity Failures
- Published
- Modified
- Assigned by
- Octopus (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Explain CVE-2026-116835 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-116835?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-116835?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-116835 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
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Affected
- octopus deploy:octopus server
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Octopus Deploy Octopus Server | from 2025.3.11571 before 2026.2.13503 |
| Octopus Deploy Octopus Server | from 2026.3.0 before 2026.3.15894 |