CVE-2026-19671

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/cisagov/Malcolm/security/advisories/GHSA-f2v6-8cj4-mhr6
https://www.cisa.gov/news-events/ics-advisories/icsa-26-230-01
https://github.com/cisagov/Malcolm/security/advisories/GHSA-f2v6-8cj4-mhr6

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-18 20:17

Updated : 2026-09-08 15:28

NVD link : CVE-2026-19671

Mitre link : CVE-2026-19671

CVE.ORG link : CVE-2026-19671

JSON object : View

Products Affected

No product.

CWE

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

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