CVE-2026-0708
HIGHLibucl: libucl: denial of service via embedded null byte in ucl input
Title source: cnaDescription
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