Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check (CVE-2026-59709) | HOL Guard CVE

Medium · CVSS 4.3CVE-2026-59709

Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check

Answer in brief

CVE-2026-59709 records a Medium severity (CVSS 4.3) vulnerability in Ghostfolio - Unauthorized Portfolio Holding Tag Modification via Missing Permission Check. The current sources do not mark it as known exploited. The current feed maps Ghostfolio/Ghostfolio (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 7, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Jul 7, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Ghostfolio/Ghostfolio (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Ghostfolio/Ghostfoliogeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Ghostfolio/Ghostfolio.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 7, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 7, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.