VulnerabilityAnalyzed
CVE-2026-0708
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.
MEDIUM 6.5EPSS 0.39%
Does this matter?
Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.39% probability · 32th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- vstakhov/libucl
- Source
- patrick@puiterwijk.org
References
- https://access.redhat.com/security/cve/CVE-2026-0708Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2427770Issue Tracking, Third Party Advisory
- https://github.com/vstakhov/libucl/issues/323Exploit, Issue Tracking, Vendor Advisory
- https://github.com/vstakhov/libucl/issues/323Exploit, Issue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.