CVE-2026-0708 HIGH

CVE-2026-0708: Libucl: libucl: denial of service via embedded null byte in ucl input

Vendor Libucl
Product libucl
Weakness CWE-125
Published March 17, 2026
Last update March 17, 2026

CVSS base score

8.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

A flaw was found in libucl. A remote attacker could exploit this by providing a specially crafted Universal Configuration Language (UCL) input that contains a key with an embedded null byte. This can cause a segmentation fault (SEGV fault) in the `ucl_object_emit` function when parsing and emitting the object, leading to a Denial of Service (DoS) for the affected system.

Key dates

02Disclosure timeline

March 17, 2026 CVE published
March 17, 2026 Record updated