CVE-2026-59709 Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check
Attackers with read-only access can modify portfolio holding tags due to missing permission checks, corrupting data categorization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59709?
CVE-2026-59709 is a medium-severity missing authorization vulnerability in Ghostfolio, published on 7 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-59709?
How do I fix CVE-2026-59709?
No fix has been published for CVE-2026-59709 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-59709 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59709 exists.
Sources
Also known as GHSA-w8j2-252j-wp53.