Stack-based Buffer Overflow Affecting libcoap package, versions [,cci.20200424)
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-CONAN-LIBCOAP-14797619
- published1 Jan 2026
- disclosed31 Dec 2025
- creditSecMate
Introduced: 31 Dec 2025
CVE-2025-34468 (opens in a new tab)How to fix?
Upgrade libcoap to version cci.20200424 or higher.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow during address resolution, when attacker-controlled hostname data is copied into a fixed-size stack buffer without proper bounds checking. An attacker can cause a crash if proxy logic is enabled in the application using the library.