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.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

EPSS

0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2025-12-08

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

Affected

• libcoap:libcoap

References

• https://github.com/obgm/libcoap/pull/1730
• https://github.com/obgm/libcoap/releases/tag/v4.3.5a

Check your stackJSON