CVE-2026-119755
Received Received - Intake

Cross-Site Request Forgery in Tasmota

Publication date: 2026-11-09

Last updated on: 2026-11-09

Assigner: VulnCheck

Description
Tasmota through 16.0.0, fixed in commit 1cb7ebc, contains a cross-site request forgery vulnerability that allows unauthenticated attackers to bypass Referer-based CSRF protection in HttpCheckPriviledgedAccess() by crafting a Referer header where the device hostname or IP appears as a substring immediately after http://.evil.com/. Attackers can lure an administrator on the device's network to a malicious page to issue arbitrary console commands and reconfigure Wi-Fi, MQTT, settings, or firmware on devices lacking a WebPassword.

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Meta Information

Published
2026-11-09
Last Modified
2026-11-09
Generated
2026-11-09
AI Q&A
2026-11-09
EPSS Evaluated
N/A
NVD
CVE-2026-119755
EUVD
EUVD-2026-120124

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
tasmota tasmota to 16.0.0 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

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Executive Summary

CVE-2026-119755 is a cross-site request forgery (CSRF) vulnerability in Tasmota versions up to 16.0.0. It allows unauthenticated attackers to bypass Referer-based CSRF protection by crafting a Referer header where the device hostname or IP appears as a substring after a malicious domain. This tricks administrators into executing arbitrary console commands via a malicious webpage.

Detection Guidance

To detect this vulnerability, monitor network traffic for HTTP requests with Referer headers containing your device's hostname or IP address immediately after a malicious domain (e.g., http://evil.com/device-ip). Check Tasmota device logs for unauthorized console commands or configuration changes. Verify if your Tasmota version is below 16.0.1 by running version checks on devices.

Impact Analysis

An attacker could reconfigure your Tasmota device settings like Wi-Fi, MQTT, or firmware without authentication. This could lead to unauthorized access, device takeover, or network compromise if the device lacks a WebPassword.

Mitigation Strategies

Immediately update Tasmota to the latest version (commit 1cb7ebc or later) to patch the Referer header validation flaw. If updating is not possible, enable WebPassword on all Tasmota devices to require authentication for console commands. Restrict network access to Tasmota devices and monitor for suspicious activity.

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