SEPTEMBER 20, 2026
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Case File

CVE-2026-59709

MEDIUM · CVSS 4.3 EPSS 0.20% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-07 · Last synced 2026-08-06

CyberRota Analysis

AI-Generated

The vulnerability affects Ghostfolio's API, specifically the PUT /api/v1/portfolio/holding/:dataSource/:symbol/tags endpoint, which improperly verifies the Access.permissions field when handling the Impersonation-Id header. This flaw allows attackers with valid read-only share tokens to modify portfolio holding tags, potentially corrupting portfolio categorization and reports. Organizations using Ghostfolio should prioritize addressing this issue to prevent unauthorized modifications to sensitive financial data.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-59709
Severity
MEDIUM
CVSS
4.3
EPSS
0.20%

Original NVD 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.