Heap-based Buffer Overflow Affecting arendst/tasmota package, versions [,15.5.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 May 2026
- disclosed27 May 2026
- creditsermikr0
Introduced: 27 May 2026
CVE-2026-38427 (opens in a new tab)How to fix?
Upgrade arendst/tasmota to version 15.5.0 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the fetch_jpg function. An attacker can execute arbitrary code or cause a denial of service by sending a JPEG stream with a Content-Length value exceeding 65535, which wraps around and results in a heap buffer overflow due to insufficient buffer allocation.