InvoiceShelf has cross-company user read/update IDOR that enables cross-tenant account takeover (CVE-2026-55610) | HOL Guard CVE

High · CVSS 8.7CVE-2026-55610

InvoiceShelf has cross-company user read/update IDOR that enables cross-tenant account takeover

Answer in brief

CVE-2026-55610 records a High severity (CVSS 8.7) vulnerability in InvoiceShelf has cross-company user read/update IDOR that enables cross-tenant account takeover. The current sources do not mark it as known exploited. The current feed maps InvoiceShelf/InvoiceShelf (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 Sep 23, 2026Updated Sep 23, 2026Source checked Sep 23, 2026First seen by HOL Sep 23, 2026Material review Sep 23, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.7
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.7. 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 InvoiceShelf/InvoiceShelf (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
InvoiceShelf/InvoiceShelfgeneric	<2.4.1	2.4.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for InvoiceShelf/InvoiceShelf.
Review the reported fix. Update InvoiceShelf/InvoiceShelf to 2.4.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 23, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source description

InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.1, in InvoiceShelf's multi-company installations, any user who is an Owner of one company can read and overwrite any user account in any other company on the same installation. `GET/PUT /api/v1/users/{user}` resolves the target `User` by global primary key, and `UserPolicy` checks only that the requester owns their own header-company — it never verifies that the target user belongs to that company. This allows cross-tenant disclosure of user data and full account takeover (email/password overwrite + company re-assignment). Version 2.4.1 fixes the issue.

Quoted source text, attributed separately from HOL analysis.