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vuln-cve/data/2026/55xxx/CVE-2026-55195.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-55195",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-16T15:20:43.087Z",
"datePublished": "2026-07-08T20:30:58.654Z",
"dateUpdated": "2026-07-09T14:06:02.499Z"
},
"containers": {
"cna": {
"title": "py7zr: Decompression bomb (zip bomb) denial of service via unchecked extraction size",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-409",
"lang": "en",
"description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/miurahr/py7zr/security/advisories/GHSA-gjrg-mpp7-g774",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/miurahr/py7zr/security/advisories/GHSA-gjrg-mpp7-g774"
},
{
"name": "https://github.com/miurahr/py7zr/commit/28faf107b64374fa5a02bfb93aa2024e281ca97b",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/miurahr/py7zr/commit/28faf107b64374fa5a02bfb93aa2024e281ca97b"
},
{
"name": "https://github.com/miurahr/py7zr/releases/tag/v1.1.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/miurahr/py7zr/releases/tag/v1.1.3"
}
],
"affected": [
{
"vendor": "miurahr",
"product": "py7zr",
"versions": [
{
"version": "< 1.1.3",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-07-08T20:30:58.654Z"
},
"descriptions": [
{
"lang": "en",
"value": "py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Prior to 1.1.3, py7zr's Worker.decompress() extracted archive entries without tracking total decompressed size, allowing a crafted .7z file such as a 15.6 KB archive that expands to 100 MB to exhaust disk or memory before extraction completes. This issue is fixed in version 1.1.3."
}
],
"source": {
"advisory": "GHSA-gjrg-mpp7-g774",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/miurahr/py7zr/security/advisories/GHSA-gjrg-mpp7-g774",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-09T14:05:14.472398Z",
"id": "CVE-2026-55195",
"options": [
{
"Exploitation": "poc"
},
{
"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": "2026-07-09T14:06:02.499Z"
}
}
]
}
}