CVE-2026-0708

HIGH

Libucl: libucl: denial of service via embedded null byte in ucl input

Title source: cna
STIX 2.1

Description

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.

Scores

CVSS v3 8.3
EPSS 0.0009
EPSS Percentile 24.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-125
Status published
Products (1)
libucl/libucl 3e7f023e184e06f30fb5792dacd9dd0f8b692f1b
Published Mar 17, 2026
Tracked Since Mar 17, 2026