---
id: CVE-2026-59709
title: >-
  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
summary: >-
  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.
  Attac…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
vendor: Ghostfolio
product: Ghostfolio
affected:
  - Ghostfolio <= 3.6.0
published: '2026-07-07'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T18:16:55.150'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59709'
references:
  - url: 'https://github.com/ghostfolio/ghostfolio'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ghostfolio/ghostfolio/commit/697ef59e3b58bebc5c21a9e482e4f5643390f316
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ghostfolio/ghostfolio/issues/7196'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/ghostfolio-unauthorized-portfolio-holding-tag-modification-via-missing-permission-check
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ghostfolio/ghostfolio/issues/7196'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-08T16:49:02.251483Z'
epss: 0.00336
epssPercentile: 0.24323
ingestedAt: '2026-09-17T18:25:15.974Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.