Medium severity · published Jul 7, 2026
CVE-2026-59709
Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GH
Ghostfolio · Ghostfolio
through 3.6.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59709
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59709
github.com
https://github.com/ghostfolio/ghostfolio
github.com
https://github.com/ghostfolio/ghostfolio/commit/697ef59e3b58bebc5c21a9e482e4f5643390f316
github.com
https://github.com/ghostfolio/ghostfolio/issues/7196
www.vulncheck.com
https://www.vulncheck.com/advisories/ghostfolio-unauthorized-portfolio-holding-tag-modification-via-missing-permission-check
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