What is CVE-2026-3837?

CVE-2026-3837 is a medium-severity vulnerability in Frappe, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-22.

How severe is CVE-2026-3837?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Frappe

CVE-2026-3837

An authenticated attacker can persist crafted values in multiple field types and trigger client-side script execution when another user opens the affected document in Desk. The vulnerable formatter implementations interpolate stored values…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (9.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Frappe — versions 16.10.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

help@fluidattacks.com (Exploit, Third Party Advisory, third-party-advisory)
help@fluidattacks.com (Product, product)
help@fluidattacks.com (Patch, patch, Issue Tracking)

Frequently asked questions

What is CVE-2026-3837?: CVE-2026-3837 is a medium-severity vulnerability in Frappe, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-22.
How severe is CVE-2026-3837?: Medium severity. CVSS v3 base score is 5.4 out of 10.