# CVE-2026-26270: InvoicePlane has Stored Cross-Site Scripting Issue in Identifier Formatting

> Authenticated users can inject malicious scripts into invoice identifiers, leading to code execution when other users view invoices or the dashboard.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Feb 2026
- **Updated:** 19 Feb 2026
- **Also known as:** GHSA-432m-jv69-qp5j

## What is CVE-2026-26270?

CVE-2026-26270 is a medium-severity cross-site scripting vulnerability in InvoicePlane, published on 18 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. A Stored Cross-Site Scripting (XSS) vulnerability exists in InvoicePlane (latest version) that allows an authenticated user with permissions to manage Invoice Groups to inject malicious JavaScript into the "Identifier Format" field. This script executes when any user views the invoice list or the main dashboard. Version 1.7.1 patches the issue.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-26270?

It affects 1 product.


Products: Invoiceplane Invoiceplane.

## How do I fix CVE-2026-26270?

No fix has been published for CVE-2026-26270 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-26270 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26270 exists.

## Other vulnerabilities in InvoicePlane

- [CVE-2025-67084](https://insights.sbomify.com/CVE-2025-67084/): File upload in n/a (critical 9.9)
- [CVE-2024-56975](https://insights.sbomify.com/CVE-2024-56975/): File upload in n/a (critical 9.8)
- [CVE-2026-23491](https://insights.sbomify.com/CVE-2026-23491/): InvoicePlane has Unauthenticated Path Traversal in Guest Controller (critical 9.3)
- [CVE-2026-25548](https://insights.sbomify.com/CVE-2026-25548/): InvoicePlane Vulnerable to Remote Code Execution via Local File Inclusion and Log Poisoning (critical 9.1)
- [CVE-2017-1000238](https://insights.sbomify.com/CVE-2017-1000238/): File upload in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-26270 and fix it if it is affected.

What it is: CVE-2026-26270 is a medium-severity cross-site scripting vulnerability in InvoicePlane, published on 18 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26270 exists.

Affected product: InvoicePlane. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-26270/ (Markdown: https://insights.sbomify.com/CVE-2026-26270/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-26270
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26270
- OSV: https://osv.dev/vulnerability/CVE-2026-26270

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-26270/
Summaries are generated and may contain mistakes; the official description above is the record.