Medium severity4.3NVD Advisory· Published Jul 7, 2026· Updated Sep 17, 2026
CVE-2026-59709
CVE-2026-59709
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.
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Affected products
1Patches
Vulnerability mechanics
References
3News mentions
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