CVE-2026-19671
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
Malcolm's upload-processing pipeline enforces limits on container archives but not on single-stream compressed formats. An authenticated user can upload a small, highly compressible file that decompresses to an unbounded size, exhausting the shared Docker volume and disrupting the platform.
Risk Assessment
The risk includes disk exhaustion, potentially causing outages for services like OpenSearch, Logstash, Arkime, and Zeek, affecting all users.
Recommendation
Upgrade Malcolm to a version that applies limits to single-stream compressed formats as well.
Original NVD description (English source)
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.