{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107335", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "state": "PUBLISHED", "assignerShortName": "icscert", "dateReserved": "2026-10-07T18:31:15.966Z", "datePublished": "2026-10-08T17:30:12.206Z", "dateUpdated": "2026-10-08T17:30:12.206Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2026-10-08T17:30:12.206Z"}, "title": "Improper Handling of Highly Compressed Data in Malcolm", "datePublic": "2026-10-07T19:02:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-409", "description": "CWE-409 Improper handling of highly compressed data (data amplification)", "type": "CWE"}]}], "affected": [{"vendor": "CISA", "product": "Malcolm", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "26.07.1", "versionType": "custom"}, {"status": "unaffected", "version": "26.08.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Malcolm's upload-processing pipeline (scripts/safe-extract.py) enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives (zip/tar/rar/7z via libarchive), but those limits are not applied when the uploaded file is a single-stream compressed format (.gz, .bz2, .xz, .lzma, .lz) that isn't a .tar.*-style archive. Any authenticated user permitted to upload PCAP/log files can upload a small, highly compressible file (e.g. a gzip bomb) that decompresses to an effectively unbounded size on disk, exhausting the shared Docker volume used by OpenSearch, Logstash, Arkime, and Zeek, and disrupting the platform for all users.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Malcolm's upload-processing pipeline (<code>scripts/safe-extract.py</code>) enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives (zip/tar/rar/7z via libarchive), but those limits are <strong>not</strong> applied when the uploaded file is a single-stream compressed format (<code>.gz</code>, <code>.bz2</code>, <code>.xz</code>, <code>.lzma</code>, <code>.lz</code>) that isn't a <code>.tar.*</code>-style archive. Any authenticated user permitted to upload PCAP/log files can upload a small, highly compressible file (e.g. a gzip bomb) that decompresses to an effectively unbounded size on disk, exhausting the shared Docker volume used by OpenSearch, Logstash, Arkime, and Zeek, and disrupting the platform for all users."}]}], "references": [{"url": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-jr6p-63pg-hr6g", "tags": ["government-resource"]}, {"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-280-01.json"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}}], "solutions": [{"lang": "en", "value": "Update to version v26.08.0", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Update to version v26.08.0"}]}], "credits": [{"lang": "en", "value": "Seth Grover", "type": "finder"}], "source": {"advisory": "ICSA-26-280-01", "discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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