Bug 2569570 (CVE-2026-119755)

Summary: CVE-2026-119755 tasmota: tasmota: Arbitrary command execution via CSRF protection bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Tasmota. A remote attacker can exploit a Cross-Site Request Forgery (CSRF) vulnerability by tricking a user on the local network into visiting a malicious webpage. Because the web interface improperly validates HTTP Referer headers, the attacker can bypass request verification on devices lacking password protection to execute arbitrary console commands, alter device configurations, or modify firmware.
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Description OSIDB Bzimport 2026-11-10 13:05:23 UTC
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.