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CriticalVulnerabilityCVE-2026-119145updated 29 Oct 2026, 16:20 UTC

Frappe framework: file upload can write files outside storage folder, enabling server takeover

A logged-in user can upload a specially crafted file that gets saved to a place on the server it should never reach. This can let the attacker run their own code on the server.

Fix availableOfficial source
SeverityCriticalCVSS 9.4 of 10
Being exploited?UnclearNo reports either way yet
Fix available?YesFrappe 15.121.0 and Frappe 16.34.0 (and later) · since 29 Oct 2026
How sure is this?Official sourceBacked by an official source

How the attack works simplified

  1. 1Attacker logs inAny valid user account works
  2. 2Crafted file uploadDestination path is not checked
  3. 3File written outside storageLands in unintended server location
  4. 4Code executedMalicious file runs on the server
  5. ResultAttacker controls the server

What happened

Path traversal in Frappe's file-upload handling: the destination path is not validated before writing to disk, so authenticated users can write files outside the intended storage directory, leading to remote code execution.

Why it is dangerous: An attacker with any valid login could gain control of the server, reading or changing data and disrupting services. Organizations running Frappe-based applications with user accounts are at risk.

Are you affected?

You are affected if you run Frappe before 15.121.0 or Frappe 16.x before 16.34.0 and have users who can log in.

Frappe before 15.121.0; Frappe 16.x before 16.34.0

What to do

  1. Update Frappe to 15.121.0 or later, or to 16.34.0 or later, depending on your branch
  2. Review recent file uploads and server files for unexpected or unknown files
  3. Restrict who can create accounts and log in until the update is applied

Timeline

  1. 29 Oct 2026, 16:18 UTC
    Publicly disclosed
  2. 29 Oct 2026, 16:18 UTC
    Reported by NVD · NVD
  3. 29 Oct 2026, 16:20 UTC
    Picked up by Zero Radar

Sources 1 report, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-119145
CVSS
9.4 / 10
Disclosed
29 Oct 2026, 16:18 UTC
On Zero Radar
29 Oct 2026, 16:20 UTC (2 min after disclosure)
Last change
29 Oct 2026, 16:20 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Frappe framework: file upload can write files outside storage folder, enabling server takeover · Zero Radar