CVE-2026-59709

mediumCVSS 4.3covered by 1 sourcefirst seen 2026-07-07

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.

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Exploitation outlook

Low exploitation risk0.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-59709: Ghostfolio's PUT /api/v1/portfolio/holding/:dataSource/:symbol/tags endpoint fails to verify A…nvd · 2026-07-07

External references

NVD record for CVE-2026-59709

CVE.org record

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