CVE-2025-55013 json
Assemblyline 4 Service Client: Arbitrary Write through path traversal in Client code
published 2025-07-25 15 mo ago modified 2026-07-07 4 mo ago also GHSA-75jv-vfxf-3865 , PYSEC-2026-1194 , EUVD-2025-24028
- cvss
- 4.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
The Assemblyline 4 Service Client interfaces with the API to fetch tasks and publish the result for a service in Assemblyline 4. In versions below 4.6.1.dev138, the Assemblyline 4 Service Client (task_handler.py) accepts a SHA-256 value returned by the service server and uses it directly as a local file name.A malicious or compromised server (or any MITM that can speak to client) can return a path-traversal payload such as `../../../etc/cron.d/evil` and force the client to write the downloaded bytes to an arbitrary location on disk. This is fixed in version 4.6.1.dev138.
Patch / fix
- pypi assemblyline-service-client 4.6.0.stable11, 4.6.1.dev138
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 14 mo ago
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.2 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 4.2 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |
| OSV | 3.1 | 4.2 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | assemblyline-service-client | <4.6.0.stable11 >=4.6.1.dev0, <4.6.1.dev138 |
4.6.0.stable11 4.6.1.dev138 |
Affected products
- CybercentreCanada assemblyline
Classification
- Weakness
-
- CWE-23 Relative Path Traversal
References
-
github.com
/CybercentreCanada/assemblyline-service-client/commit/351414e7e96cc1f5640ae71ae51b939e8ba30900
web
-
github.com
/CybercentreCanada/assemblyline/security/advisories/GHSA-75jv-vfxf-3865
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-55013
advisory
-
github.com
/CybercentreCanada/assemblyline-service-client
package
-
pypi.org
/project/assemblyline-service-client
package
-
github.com
/advisories/GHSA-75jv-vfxf-3865
advisory
Sources
- CVE List CVE-2025-55013
- GitHub Advisory GHSA-75jv-vfxf-3865
- NVD CVE-2025-55013
- OSV PYSEC-2026-1194
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