{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-0708", "assignerOrgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5", "state": "PUBLISHED", "assignerShortName": "fedora", "dateReserved": "2026-01-08T03:31:35.226Z", "datePublished": "2026-03-17T02:28:08.429Z", "dateUpdated": "2026-03-17T02:44:16.527Z"}, "containers": {"cna": {"title": "Libucl: libucl: denial of service via embedded null byte in ucl input", "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "libucl", "product": "libucl", "versions": [{"status": "affected", "version": "3e7f023e184e06f30fb5792dacd9dd0f8b692f1b", "versionType": "git"}], "packageName": "libucl", "collectionURL": "https://github.com/vstakhov/libucl", "defaultStatus": "unknown"}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-0708", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427770", "name": "RHBZ#2427770", "tags": ["issue-tracking", "x_refsource_REDHAT"]}, {"url": "https://github.com/vstakhov/libucl/issues/323"}], "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H", "version": "3.1"}, "format": "CVSS"}], "datePublic": "2025-05-15T00:00:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "description": "Out-of-bounds Read", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-125: Out-of-bounds Read", "workarounds": [{"lang": "en", "value": "To mitigate this issue, applications utilizing `libucl` should avoid processing untrusted input that contains keys with embedded null bytes, especially when operating in `UCL_PARSER_ZEROCOPY` mode. Restricting input to trusted sources can reduce exposure."}], "timeline": [{"lang": "en", "time": "2026-01-08T03:30:46.275Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2025-05-15T00:00:00.000Z", "value": "Made public."}], "providerMetadata": {"orgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5", "shortName": "fedora", "dateUpdated": "2026-03-17T02:44:16.527Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-0708", "lastModified": "2026-03-17T04:16:07.750", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.5, "source": "patrick@puiterwijk.org", "type": "Secondary"}]}, "published": "2026-03-17T04:16:07.750", "references": [{"source": "patrick@puiterwijk.org", "url": "https://access.redhat.com/security/cve/CVE-2026-0708"}, {"source": "patrick@puiterwijk.org", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427770"}, {"source": "patrick@puiterwijk.org", "url": "https://github.com/vstakhov/libucl/issues/323"}], "sourceIdentifier": "patrick@puiterwijk.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "patrick@puiterwijk.org", "type": "Secondary"}]}

{}

{}