CSRF in Arendst Tasmota
CVE-2026-119755
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.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/arendst/Tasmota/commit/1cb7ebcafb0b79f1836d0e9948275f78abc17d7b (issue-tracking, patch)
- www.vulncheck.com/advisories/tasmota-csrf-via-referer-header-validation-bypass (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119755?
- CVE-2026-119755 is a high-severity vulnerability in Arendst Tasmota, classified under Cross-Site Request Forgery (CSRF). CVSS score: 7.5/10. Published 2026-11-09.
- How severe is CVE-2026-119755?
- High severity. CVSS v3 base score is 7.5 out of 10.