CVE-2026-59709 PUBLISHED

Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check

Assigner: VulnCheck
Reserved: 06.07.2026 Published: 07.07.2026 Updated: 07.07.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 4.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Ghostfolio
Product	Ghostfolio
Versions	Default: unaffected affected from 0 to 3.6.0 (incl.) affected from 0 to 697ef59 (excl.)

CVE-2026-59709 PUBLISHED

Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check

Metrics

Product Status

Credits

References

Problem Types