CVE-2026-42839 ERPNext 16.16.0 - Stored XSS in POS cart item rendering
Authenticated users can inject malicious scripts into item fields, leading to stored XSS execution in the POS interface for other operators.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-42839?
CVE-2026-42839 is a medium-severity cross-site scripting vulnerability in Frappe ERPNext, published on 3 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
An authenticated ERPNext user with Item record edit permissions can persist arbitrary HTML/JavaScript in the item_name, description, or image fields of an Item and trigger unescaped rendering in the Point of Sale (POS) cart interface for every operator who adds that item to a transaction.This issue affects ERPNext: 16.16.0.
Weakness: CWE-79
Which versions are affected by CVE-2026-42839?
How do I fix CVE-2026-42839?
No fix has been published for CVE-2026-42839 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-42839 being exploited?
There is no known exploitation of CVE-2026-42839 in the wild and no public exploit code.
Sources
Also known as GHSA-hc32-c5xw-9f2m.