What is CVE-2026-26281?

CVE-2026-26281 is a medium-severity vulnerability in Invoiceplane, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-02-18.

How severe is CVE-2026-26281?

Medium severity. CVSS v3 base score is 4.4 out of 10.

XSS in Invoiceplane

CVE-2026-26281

InvoicePlane is a self-hosted open source application for managing invoices, clients, and payments. A stored cross-site scripting (XSS) vulnerability in the Sumex invoice view allows an authenticated user with client and invoice management privileges to execute arbitrary JavaScript in the browser of any user viewing the invoice. This can lead to session hijacking, data theft, or other malicious actions on behalf of the victim user. Version 1.7.1 patches the issue.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Invoiceplane — versions 1.7.0, = 1.7.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-26281?: CVE-2026-26281 is a medium-severity vulnerability in Invoiceplane, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-02-18.
How severe is CVE-2026-26281?: Medium severity. CVSS v3 base score is 4.4 out of 10.