CVE-2026-59708 ghostfolio CVE debrief

Who should care

Defenders responsible for Ghostfolio deployments should assess exposure and prioritize mitigation to prevent unauthorized access to sensitive portfolio information. This includes verifying and mitigating exposure to the affected Ghostfolio endpoint, implementing authentication and authorization for accessing portfolio data, and monitoring for suspicious activity on the affected endpoint. Security teams and vulnerability management teams should also review

Why it matters

CVE-2026-59708 allows unauthenticated access to sensitive portfolio information in Ghostfolio, defenders should verify and mitigate exposure.

• Verify and mitigate exposure to the affected Ghostfolio endpoint to prevent unauthorized access to portfolio data
• Implement authentication and authorization for accessing portfolio data to prevent unauthorized access
• Monitor for suspicious activity on the affected endpoint to detect potential exploitation

Technical summary

The GET /api/v1/public/:accessId/portfolio endpoint in Ghostfolio accepts private access IDs without validating granteeUserId filtering, allowing unauthenticated access to full portfolio data, including holdings, quantities, buy prices, and performance metrics. This vulnerability allows attackers with a private access ID to retrieve sensitive portfolio information without authentication. Defenders should prioritize verifying and mitigating exposure to the affected Ghostfolio endpoint to prevent unauthorized access to portfolio data.

Defensive priority

Defenders should prioritize verifying and mitigating exposure to the affected Ghostfolio endpoint.

Recommended defensive actions

• Verify and mitigate exposure to the affected Ghostfolio endpoint
• Implement authentication and authorization for accessing portfolio data
• Monitor for suspicious activity on the affected endpoint
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Ghostfolio's GET /api/v1/public/:accessId/portfolio endpoint. The vulnerability allows unauthenticated access to sensitive portfolio information. Defenders should verify and mitigate exposure to the affected Ghostfolio endpoint. The CVE record was published on 2026-07-07T19:16:55.130Z and has not been modified since then. There are no known exploit details, but defenders should review the official advisory and CVE record to validate affected scope, severity, and and

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.