context-engine project versions up to 0.7.1 ace/skillbook.py save_to_file checkpoint_dir path traversal

Summaryinfo

A vulnerability was found in context-engine project versions up to 0.7.1. It has been declared as critical. The impacted element is the function save_to_file of the file ace/skillbook.py. Such manipulation of the argument checkpoint_dir leads to path traversal. This vulnerability is documented as CVE-2026-29870. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in context-engine project versions up to 0.7.1 and classified as critical. Affected by this issue is the function save_to_file of the file ace/skillbook.py. The manipulation of the argument checkpoint_dir with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A directory traversal vulnerability in the agentic-context-engine project versions up to 0.7.1 allows arbitrary file writes via the checkpoint_dir parameter in OfflineACE.run. The save_to_file method in ace/skillbook.py fails to normalize or validate filesystem paths, allowing traversal sequences to escape the intended checkpoint directory. This vulnerability allows attackers to overwrite arbitrary files accessible to the application process, potentially leading to application corruption, privilege escalation, or code execution depending on the deployment context.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-29870 since 03/04/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/25/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17419). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Project Management Software

Name

• context-engine project versions

Version

• 0.7.0
• 0.7.1

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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