CVE-2026-11841

criticalCVSS 9.4covered by 1 sourcefirst seen 2026-07-28

An attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed through the HTTP-based file access feature, allowing access without authentication. This includes device parameter files, enabling an attacker to read and modify application settings, including customer-defined passwords. Additionally, exposure of the custom application directory may allow execution of arbitrary Lua code within the sandboxed AppEngine environment.

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Exploitation outlook

Low exploitation risk0.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-11841: An attacker may perform unauthenticated read and write operations on sensitive filesystem area…nvd · 2026-07-28

External references

NVD record for CVE-2026-11841

CVE.org record

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