CVE-2026-63133
Malcolm has Uncontrolled Resource Consumption in Archive Extraction (Inode-Exhaustion DoS)
Description
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue.
INFO
Published Date :
Aug. 11, 2026, 9:17 p.m.
Last Modified :
Oct. 24, 2026, 4:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Malcolm to version 26.07.0 or later.
- Apply vendor patches or updates immediately.
- Monitor system resource usage.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63133.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63133 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63133
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63133 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63133 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: Malcolm de cisagov, Description: Malcolm es un conjunto de herramientas de análisis de tráfico de red. Antes de la versión 26.07.0, “safe-extract.py” extrae archivos subidos sin límite en el número de entradas, la profundidad del directorio, el total de entradas o el tamaño de salida. Un archivo malicioso pequeño que contiene un gran número de entradas de directorio o archivo hace que el contenedor de procesamiento de filebeat cree un número ilimitado de objetos del sistema de archivos, agotando los inodos o los metadatos del sistema de archivos y denegando el servicio a la tubería de procesamiento y a cualquier servicio que comparta el mismo punto de montaje. La versión 26.07.0 soluciona el problema. Title: Malcolm de cisagov, Description: Malcolm es un conjunto de herramientas de análisis de tráfico de red. Antes de la versión 26.07.0, “safe-extract.py” extrae archivos subidos sin límite en el número de entradas, la profundidad del directorio, el total de entradas o el tamaño de salida. Un archivo malicioso pequeño que contiene un gran número de entradas de directorio o archivo hace que el contenedor de procesamiento de filebeat cree un número ilimitado de objetos del sistema de archivos, agotando los inodos o los metadatos del sistema de archivos y denegando el servicio a la tubería de procesamiento y a cualquier servicio que comparta el mismo punto de montaje. La versión 26.07.0 soluciona el problema. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: Malcolm de cisagov, Description: Malcolm es un conjunto de herramientas de análisis de tráfico de red. Antes de la versión 26.07.0, “safe-extract.py” extrae archivos subidos sin límite en el número de entradas, la profundidad del directorio, el total de entradas o el tamaño de salida. Un archivo malicioso pequeño que contiene un gran número de entradas de directorio o archivo hace que el contenedor de procesamiento de filebeat cree un número ilimitado de objetos del sistema de archivos, agotando los inodos o los metadatos del sistema de archivos y denegando el servicio a la tubería de procesamiento y a cualquier servicio que comparta el mismo punto de montaje. La versión 26.07.0 soluciona el problema. -
CVE Modified by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Changed Description Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue. Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/63xxx/CVE-2026-63133.json">CVE-2026-63133</a> Added Reference https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-230-01.json Added Reference https://github.com/cisagov/Malcolm/releases/tag/v26.07.0 Added Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-c35g-mgc3-95rx Added Reference https://www.cisa.gov/news-events/ics-advisories/icsa-26-230-01 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 02, 2026
Action Type Old Value New Value Added Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-c35g-mgc3-95rx Removed Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-c35g-mgc3-95rx -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 12, 2026
Action Type Old Value New Value Added Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-c35g-mgc3-95rx Added SSVC {'id': 'CVE-2026-63133', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-12T13:01:08.328295Z'} -
New CVE Received by [email protected]
Aug. 11, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'cisagov', 'product': 'Malcolm', 'versions': [{'status': 'affected', 'version': '< 26.07.0'}]}] Added Description Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Reference https://github.com/cisagov/Malcolm/releases/tag/v26.07.0 Added Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-c35g-mgc3-95rx