{"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":"2026-10-14T19:36:54.743Z"},"containers":{"cna":{"providerMetadata":{"orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","shortName":"icscert","dateUpdated":"2026-10-14T19:36:54.743Z"},"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-f2v6-8cj4-mhr6"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-280-01.json","tags":["government-resource"]}],"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":"reporter"},{"lang":"en","value":"tinyb0y","type":"finder"}],"source":{"advisory":"ICSA-26-280-01","discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"references":[{"url":"https://github.com/cisagov/Malcolm/security/advisories/GHSA-jr6p-63pg-hr6g","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-08T19:05:10.578499Z","id":"CVE-2026-107335","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"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":"2026-10-08T19:05:41.651Z"}}]}}