CVE-2026-0708 (GCVE-0-2026-0708)

Vulnerability from cvelistv5 – Published: 2026-03-17 02:28 – Updated: 2026-03-17 02:44
VLAI?
Title
Libucl: libucl: denial of service via embedded null byte in ucl input
Summary
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.
CWE
Assigner
Impacted products
Vendor Product Version
libucl libucl Affected: 3e7f023e184e06f30fb5792dacd9dd0f8b692f1b (git)
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          "defaultStatus": "unknown",
          "packageName": "libucl",
          "product": "libucl",
          "vendor": "libucl",
          "versions": [
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              "version": "3e7f023e184e06f30fb5792dacd9dd0f8b692f1b",
              "versionType": "git"
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      "datePublic": "2025-05-15T00:00:00.000Z",
      "descriptions": [
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            "attackVector": "NETWORK",
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
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            "scope": "UNCHANGED",
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              "description": "Out-of-bounds Read",
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      "providerMetadata": {
        "dateUpdated": "2026-03-17T02:44:16.527Z",
        "orgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
        "shortName": "fedora"
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      "references": [
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          "tags": [
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          "url": "https://access.redhat.com/security/cve/CVE-2026-0708"
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        {
          "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."
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      ],
      "title": "Libucl: libucl: denial of service via embedded null byte in ucl input",
      "workarounds": [
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          "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."
        }
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  "cveMetadata": {
    "assignerOrgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
    "assignerShortName": "fedora",
    "cveId": "CVE-2026-0708",
    "datePublished": "2026-03-17T02:28:08.429Z",
    "dateReserved": "2026-01-08T03:31:35.226Z",
    "dateUpdated": "2026-03-17T02:44:16.527Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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  }
}


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