CVE-2026-63134
Malcolm's Path Traversal in Archive Extraction Allows Arbitrary Directory Creation
Description
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` protects file extraction with libarchive's secure flags, but creates directory entries with a raw `os.makedirs(os.path.join(dest, entry.pathname))` that has no traversal protection. An uploaded malicious archive containing a directory entry with a `../` sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. 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 | MEDIUM | [email protected] |
Solution
- Update Malcolm to version 26.07.0 or newer.
- Verify extraction logic for directory entries.
- Implement secure path handling during extraction.
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-2026-63134.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63134 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-2026-63134
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-2026-63134 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63134 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 una suite de herramientas de análisis de tráfico de red. Antes de la versión 26.07.0, “safe-extract.py” protege la extracción de archivos con las banderas de seguridad de libarchive, pero crea entradas de directorio con una llamada “os.makedirs(os.path.join(dest, entry.pathname))” sin procesar que no tiene protección contra la transversalidad. Un archivo malicioso subido que contiene una entrada de directorio con una secuencia “.. / ” o una ruta absoluta provoca que el contenedor de procesamiento de filebeat cree directorios fuera del directorio de extracción previsto. La versión 26.07.0 corrige el problema. Title: Malcolm de cisagov, Description: Malcolm es una suite de herramientas de análisis de tráfico de red. Antes de la versión 26.07.0, “safe-extract.py” protege la extracción de archivos con las banderas de seguridad de libarchive, pero crea entradas de directorio con una llamada “os.makedirs(os.path.join(dest, entry.pathname))” sin procesar que no tiene protección contra la transversalidad. Un archivo malicioso subido que contiene una entrada de directorio con una secuencia “.. / ” o una ruta absoluta provoca que el contenedor de procesamiento de filebeat cree directorios fuera del directorio de extracción previsto. La versión 26.07.0 corrige 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 una suite de herramientas de análisis de tráfico de red. Antes de la versión 26.07.0, “safe-extract.py” protege la extracción de archivos con las banderas de seguridad de libarchive, pero crea entradas de directorio con una llamada “os.makedirs(os.path.join(dest, entry.pathname))” sin procesar que no tiene protección contra la transversalidad. Un archivo malicioso subido que contiene una entrada de directorio con una secuencia “.. / ” o una ruta absoluta provoca que el contenedor de procesamiento de filebeat cree directorios fuera del directorio de extracción previsto. La versión 26.07.0 corrige 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` protects file extraction with libarchive's secure flags, but creates directory entries with a raw `os.makedirs(os.path.join(dest, entry.pathname))` that has no traversal protection. An uploaded malicious archive containing a directory entry with a `../` sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. Version 26.07.0 fixes the issue. Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` protects file extraction with libarchive's secure flags, but creates directory entries with a raw `os.makedirs(os.path.join(dest, entry.pathname))` that has no traversal protection. An uploaded malicious archive containing a directory entry with a `../` sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. Version 26.07.0 fixes the issue. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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:L/A:L Added CWE CWE-22 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/63xxx/CVE-2026-63134.json">CVE-2026-63134</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-65mm-vgrw-vqx4 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-65mm-vgrw-vqx4 Removed Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-65mm-vgrw-vqx4 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 13, 2026
Action Type Old Value New Value Added Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-65mm-vgrw-vqx4 Added SSVC {'id': 'CVE-2026-63134', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-13T14:59:57.659002Z'} -
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` protects file extraction with libarchive's secure flags, but creates directory entries with a raw `os.makedirs(os.path.join(dest, entry.pathname))` that has no traversal protection. An uploaded malicious archive containing a directory entry with a `../` sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. Version 26.07.0 fixes the issue. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Added CWE CWE-22 Added Reference https://github.com/cisagov/Malcolm/releases/tag/v26.07.0 Added Reference https://github.com/cisagov/Malcolm/security/advisories/GHSA-65mm-vgrw-vqx4