CVE-2026-0708
CVE-2026-0708 is a high-severity vulnerability in Vstakhov Libucl with a CVSS 3.x base score of 8.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 8.3)
- EPSS exploit prediction: 0% (31st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-12534
- Weakness: CWE-125
- Affected product: Vstakhov Libucl
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-0708?
- 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.
- How severe is CVE-2026-0708?
- CVE-2026-0708 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability high.
- Is CVE-2026-0708 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-0708?
- CVE-2026-0708 affects Vstakhov Libucl. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-0708?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-0708 have an EU (EUVD) identifier?
- Yes. CVE-2026-0708 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12534.
- When was CVE-2026-0708 published?
- CVE-2026-0708 was published on 2026-03-17 and last updated on 2026-06-17.
References
- https://access.redhat.com/security/cve/CVE-2026-0708
- https://bugzilla.redhat.com/show_bug.cgi?id=2427770
- https://github.com/vstakhov/libucl/issues/323
Affected products (1)
- cpe:2.3:a:vstakhov:libucl:*:*:*:*:*:*:*:*
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