EUVD-2026-61160
GHSA-3wrw-4pcx-6p2g
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network upload vector, low privilege (upload permission required per description), no confidentiality or integrity impact, high availability impact from shared Docker volume exhaustion affecting all platform services.
Primary rating from Vendor (hq).
CVSS VectorVendor: hq
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Uncontrolled decompression in Malcolm's upload-processing pipeline allows any authenticated user with upload permissions to exhaust the shared Docker volume by submitting a single-stream compression bomb (.gz, .bz2, .xz, .lzma, .lz). The flaw in scripts/safe-extract.py is a logic gap: entry-count, nesting-depth, and total-uncompressed-byte guards exist for container formats (zip/tar/rar/7z via libarchive) but are entirely absent for single-stream formats, allowing unbounded expansion. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated account with permission to upload PCAP or log files to Malcolm - this is a standard operator-level capability within the platform, not an administrative privilege, meaning the attacker pool includes any analyst granted normal ingestion rights. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 7.1 with VA:H, PR:L, and AV:N accurately reflects the real-world attack conditions. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the patch documented in GitHub Security Advisory GHSA-f2v6-8cj4-mhr6 (https://github.com/cisagov/Malcolm/security/advisories/GHSA-f2v6-8cj4-mhr6); the exact patched release version is not enumerated in the provided data and must be confirmed directly from the advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: restrict upload permissions in Malcolm to trusted administrators only and disable unprivileged user uploads. …
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External POC / Exploit Code
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