Vulnerability Description
Ghostfolio's PUT /api/v1/portfolio/holding/:dataSource/:symbol/tags endpoint fails to verify Access.permissions field when processing the Impersonation-Id header, allowing read-only access grantees to modify portfolio holding tags. Attackers with valid read-only share tokens can assign or remove tags on victim holdings, corrupting portfolio categorization and reports.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/ghostfolio/ghostfolio
- https://github.com/ghostfolio/ghostfolio/commit/697ef59e3b58bebc5c21a9e482e4f564
- https://github.com/ghostfolio/ghostfolio/issues/7196
- https://www.vulncheck.com/advisories/ghostfolio-unauthorized-portfolio-holding-t
- https://github.com/ghostfolio/ghostfolio/issues/7196
FAQ
What is CVE-2026-59709?
CVE-2026-59709 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Ghostfolio's PUT /api/v1/portfolio/holding/:dataSource/:symbol/tags endpoint fails to verify Access.permissions field when processing the Impersonation-Id header, allowing read-only access grantees to...
How severe is CVE-2026-59709?
CVE-2026-59709 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59709?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.