Quick answers
- Is CVE-2026-55561 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-55561 being exploited in the wild.
- How severe is CVE-2026-55561?
- Informational severity, published 28 October 2026.
- Which products and versions are affected?
- InvoicePlane before 1.7.2-beta-1.
- Is there a fix for CVE-2026-55561?
- Yes: fixed in 1.7.2-beta-1, 1.7.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-55561 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-55561?
- Check whether you run InvoicePlane at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 1.7.2-beta-1, 1.7.2
Technical details
The Guest Quotes controller's approve() and reject() methods failed to scope operations to the user's assigned clients, instead directly calling approve_quote_by_id() and reject_quote_by_id() without client-based access checks. A guest user could exploit this by supplying sequential quote IDs to modify quotes outside their assigned scope, and the generate_pdf() method also marked quotes as viewed before enforcing client scope restrictions.
Affected products
- InvoicePlane InvoicePlane before 1.7.2-beta-1
Timeline
- 2026-10-28: disclosed