CVE-2026-59709 – Ghostfolio – Unauthorized Portfolio Holding Tag Modification via Missing Permission Check

CVE ID :CVE-2026-59709

Published : July 7, 2026, 3:16 p.m. | 31 minutes ago

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.

Severity: 5.3 | MEDIUM

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