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.
Advisories
No advisories yet.
Fixes
Solution
Update to version v26.08.0
Workaround
No workaround given by the vendor.
References
History
Fri, 09 Oct 2026 07:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisagov
Cisagov malcolm |
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| Vendors & Products |
Cisagov
Cisagov malcolm |
Thu, 08 Oct 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Improper Handling of Highly Compressed Data in Malcolm | |
| Weaknesses | CWE-409 | |
| References |
| |
| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: icscert
Published:
Updated: 2026-10-08T19:05:41.651Z
Reserved: 2026-10-07T18:31:15.966Z
Link: CVE-2026-107335
No data.
Status : Awaiting Analysis
Published: 2026-10-08T18:17:19.970
Modified: 2026-10-08T21:03:43.847
Link: CVE-2026-107335
No data.
OpenCVE Enrichment
Updated: 2026-10-09T07:15:09Z
Weaknesses