# CVE-2026-19671

## Summary

- **CVE ID:** CVE-2026-19671
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-409
- **Published:** Aug 18, 2026
- **Last Modified:** Aug 18, 2026

## 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.

## Affected Products

- CISAgov — Malcolm (0)

## References

- [CNA](https://www.cisa.gov/news-events/ics-advisories/icsa-26-230-01)
- [CNA](https://github.com/cisagov/Malcolm/security/advisories/GHSA-f2v6-8cj4-mhr6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 32.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._