Buffer Overflow Affecting arduino/ArduinoCore-avr package, versions [,1.8.8)
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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Test your applications- Snyk IDSNYK-UNMANAGED-ARDUINOARDUINOCOREAVR-20074790
- published24 Sept 2026
- disclosed11 Sept 2026
- creditUnknown
Introduced: 11 Sep 2026
CVE-2026-48490 (opens in a new tab)How to fix?
Upgrade arduino/ArduinoCore-avr to version 1.8.8 or higher.
Overview
Affected versions of this package are vulnerable to Buffer Overflow in the String::concat(float), String::concat(double), String::operator+=(), or the + operator when concatenating floating-point values of large magnitude. An attacker can cause memory corruption, denial of service, or potentially execute arbitrary code by passing specially crafted float or double values near the limits of their range to these functions.