---
cve: "CVE-2026-19671"
severity: "HIGH"
cvss: 7.1
epss: "39%"
vendor: "cisagov"
kev: false
exploited: false
published: "2026-08-18 20:17:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T10:51:35+02:00"
---

# CVE-2026-19671

> 7.1 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-19671) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_