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vuln-cve/data/2026/34xxx/CVE-2026-34743.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-34743",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-03-30T19:17:10.224Z",
"datePublished": "2026-04-02T18:36:37.450Z",
"dateUpdated": "2026-07-21T22:19:21.175Z"
},
"containers": {
"cna": {
"title": "XZ Utils: Buffer overflow in lzma_index_append()",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"lang": "en",
"description": "CWE-122: Heap-based Buffer Overflow",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 1.7,
"baseSeverity": "LOW",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/tukaani-project/xz/security/advisories/GHSA-x872-m794-cxhv",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/tukaani-project/xz/security/advisories/GHSA-x872-m794-cxhv"
},
{
"name": "https://github.com/tukaani-project/xz/commit/c8c22869e780ff57c96b46939c3d79ff99395f87",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/tukaani-project/xz/commit/c8c22869e780ff57c96b46939c3d79ff99395f87"
},
{
"name": "https://github.com/tukaani-project/xz/releases/tag/v5.8.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/tukaani-project/xz/releases/tag/v5.8.3"
}
],
"affected": [
{
"vendor": "tukaani-project",
"product": "xz",
"versions": [
{
"version": "< 5.8.3",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-04-02T18:36:37.450Z"
},
"descriptions": [
{
"lang": "en",
"value": "XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3."
}
],
"source": {
"advisory": "GHSA-x872-m794-cxhv",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"title": "CVE Program Container",
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/03/31/13"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2026/07/msg00034.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2026-07-21T22:19:21.175Z"
}
},
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-04-03T12:58:58.398176Z",
"id": "CVE-2026-34743",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-04-03T12:59:06.096Z"
}
}
]
}
}