--- id: CVE-2024-29019 aliases: - GHSA-5925-88xh-6h99 - PYSEC-2026-1327 title: ESPHome vulnerable to Authentication bypass via Cross site request forgery summary: ESPHome vulnerable to Authentication bypass via Cross site request forgery severity: high cvss: 8.1 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N' vendor: esphome product: esphome ecosystem: pip affected: - 'esphome >= 2023.12.9, < 2024.3.0' patched: - esphome 2024.3.0 published: '2024-03-21' updated: '2026-07-07' source: OSV sourceUrl: 'https://osv.dev/vulnerability/GHSA-5925-88xh-6h99' references: - url: 'https://github.com/esphome/esphome/security/advisories/GHSA-5925-88xh-6h99' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-29019' - url: 'https://github.com/esphome/esphome/pull/6396' - url: 'https://github.com/esphome/esphome/pull/6397' - url: >- https://github.com/esphome/esphome/commit/c56c40cb824e34ed2b89ba1cb8a3a5eb31459c74 - url: 'https://github.com/advisories/GHSA-9p43-hj5j-96h5' - url: 'https://github.com/esphome/esphome' - url: 'https://github.com/esphome/esphome/releases/tag/2024.3.0' tags: - osv - pip epss: 0.00269 epssPercentile: 0.19269 ingestedAt: '2026-07-08T18:25:45.825Z' --- ## Overview ### Summary API endpoints in dashboard component of ESPHome version 2023.12.9 (command line installation) are vulnerable to Cross-Site Request Forgery (CSRF) allowing remote attackers to carry out attacks against a logged user of the dashboard to perform operations on configuration files (create, edit, delete). ### Details It is possible for a malicious actor to create a specifically crafted web page that triggers a cross site request against ESPHome, this allows bypassing the authentication for API calls on the platform. ### PoC An example of malicious web page that abuses this vulnerability: In which an attacker creates and weaponizes "poc.yaml" config file containing a cookie exfiltration script and forces the payload triggering visiting the vulnerable page. Example of such script: ### Impact This vulnerability allows bypassing authentication on API calls accessing configuration file operations on the behalf of a logged user. In order to trigger the vulnerability, the victim must visit a weaponized page. In addition to this, it is possible to chain this vulnerability with GHSA-9p43-hj5j-96h5 (as seen in the PoC) to obtain a complete takeover of the user account. ## Affected packages - `esphome >= 2023.12.9, < 2024.3.0` ## Remediation Upgrade to a patched release: - `esphome 2024.3.0`