Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-107335
CISA Malcolm — Improper Handling of Highly Compressed Data in Malcolm
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N U N N H 6.5 .0046 38.2 —
AFFECTED
Product Versions Fixed
Malcolm unspecified 26.08.0
TIMELINE
Oct 7 Reserved by icscert
Oct 8 Published (CNA: icscert)
Oct 13 EXPLOIT PUBLISHED — CVE-2026-107335 (CISA Malcolm). Public exploit reference added.
Oct 14 EXPLOIT PUBLISHED — CVE-2026-107335 (CISA Malcolm). Public exploit reference 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.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| October 7, 2026 | Reserved | Reserved by icscert |
| October 8, 2026 | Published | Published (CNA: icscert) |
| October 13, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-107335 (CISA Malcolm). Public exploit reference added. |
| October 14, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-107335 (CISA Malcolm). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| CISA | Malcolm | — | — | 26.08.0 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-107335 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
