CVE-2026-49391: Frappe: Stored XSS in Column Headers via Data Import

Severity: medium (CVSS 5.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-06 · updated 2026-09-08
Weakness: CWE-79

Description

Frappe is a full-stack web application framework. Prior to 16.19.0 and 15.109.0, Data Import does not escape imported column headers before rendering previews and results, allowing an authenticated importer to persist script content that executes when another user views the import interface. This issue is fixed in versions 16.19.0 and 15.109.0.

Affected products

frappe: from 16.0.0-beta.1, < 16.19.0; before 15.109.0

References

https://github.com/frappe/frappe/commit/002a36a2668781366e4bf1ff144da5e53446f540
https://github.com/frappe/frappe/commit/2bf7b9d0b4c7f815de1c85695e9a027ecce8bed9
https://github.com/frappe/frappe/security/advisories/GHSA-7f28-gm9h-q6rg

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