CVE-2025-59391

A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service.

• CWE-125

• https://github.com/obgm/libcoap/pull/1730Issue Tracking, Patch
• https://github.com/obgm/libcoap/releases/tag/v4.3.5aRelease Notes

Published

Dec 8, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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