CVE-2026-59709
Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 7, 2026
- Updated
- Sep 24, 2026
- Reserved
- Jul 6, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
GhostfolioGhostfolio |
|
References
- GitHub Issueissue-tracking
- Productproduct
- Patch Commitpatch
- https://www.vulncheck.com/advisories/ghostfolio-unauthorized-portfolio-holding-tag-modification-via-missing-permission-checkthird-party-advisory
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