PT-2026-56198 · Ghostfolio · Ghostfolio

George Chen · Published 2026-07-07 · Updated 2026-07-07 · CVE-2026-59709

Mitre

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-59709

Affected Products

Ghostfolio

References · 5

• https://github.com/ghostfolio/ghostfolio/commit/697ef59e3b58bebc5c21a9e482e4f5643390f316 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-59709 · Security Note
• https://vulncheck.com/advisories/ghostfolio-unauthorized-portfolio-holding-tag-modification-via-missing-permission-check · Note
• https://github.com/ghostfolio/ghostfolio/issues/7196 · Note
• https://github.com/ghostfolio/ghostfolio · Note