GHSA-w8j2-252j-wp53
Ghostfolio's API endpoint for modifying portfolio holding tags does not properly verify access permissions when processing the Impersonation-Id header. This allows users with read-only access tokens to modify tags on portfolio holdings, potentially corrupting portfolio categorization and reports.
AI Analysis
Technical Summary
The vulnerability in Ghostfolio involves the PUT /api/v1/portfolio/holding/:dataSource/:symbol/tags endpoint failing to verify the Access.permissions field when handling the Impersonation-Id header. As a result, attackers possessing valid read-only share tokens can assign or remove tags on victim holdings, despite their limited access rights. This improper access control weakness corresponds to CWE-862 (Missing Authorization). No patch or remediation information is currently provided, and no known exploits are reported in the wild.
Potential Impact
Attackers with read-only share tokens can modify portfolio holding tags, which can lead to corruption of portfolio categorization and reporting data. This undermines data integrity and trust in portfolio reports but does not appear to allow unauthorized data disclosure or privilege escalation beyond tag modification.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict issuance of read-only share tokens and monitor for unusual tag modification activity if possible.
GHSA-w8j2-252j-wp53
Description
Ghostfolio's API endpoint for modifying portfolio holding tags does not properly verify access permissions when processing the Impersonation-Id header. This allows users with read-only access tokens to modify tags on portfolio holdings, potentially corrupting portfolio categorization and reports.
CVSS v4.0
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Ghostfolio involves the PUT /api/v1/portfolio/holding/:dataSource/:symbol/tags endpoint failing to verify the Access.permissions field when handling the Impersonation-Id header. As a result, attackers possessing valid read-only share tokens can assign or remove tags on victim holdings, despite their limited access rights. This improper access control weakness corresponds to CWE-862 (Missing Authorization). No patch or remediation information is currently provided, and no known exploits are reported in the wild.
Potential Impact
Attackers with read-only share tokens can modify portfolio holding tags, which can lead to corruption of portfolio categorization and reporting data. This undermines data integrity and trust in portfolio reports but does not appear to allow unauthorized data disclosure or privilege escalation beyond tag modification.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict issuance of read-only share tokens and monitor for unusual tag modification activity if possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-w8j2-252j-wp53
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-59709"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6a4e4f10c9d9e3dbe328e1c1
Added to database: 07/08/2026, 13:22:24 UTC
Last enriched: 07/08/2026, 13:53:38 UTC
Last updated: 07/09/2026, 01:14:05 UTC
Views: 10
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