T08 · Insecure Dependencies
Warning
- Location
SKILL.md:47- Finding
Unpinned Third-Party Package Installation and Update
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 30 and 47-50
Vulnerability Type: Unverified third-party dependency installation and update
Risk Level: MediumVulnerable Code
text B -- Yes --> C[Check for updates\n`cbridge update`]markdown > 🔓 **Open Source & Trustworthy**: `cbridge-agent` is fully open-source, hosted on [GitHub](https://github.com/whyischen/context-bridge) for audit and verification. Runs entirely locally with zero data leakage risk. ```bash pip install cbridge-agenttext ### Technical Analysis The Skill instructs the Agent to install `cbridge-agent` from the Python package registry without specifying an audited version, integrity hash, package signature, or immutable source revision. It also directs existing installations to execute `cbridge update`. Consequently, the code that is executed can differ from the version originally reviewed. Linking to a GitHub repository does not cryptographically establish that the registry package was built from the reviewed source. The assertion that the software has “zero data leakage risk” is also unsupported by controls present in this project. This creates a supply-chain trust boundary: compromise of the package publisher, registry account, release process, update mechanism, or a future package release could introduce attacker-controlled code. ### Attack Path 1. An attacker compromises the package publisher, distribution account, release process, or update channel. 2. The attacker publishes a malicious release under the expected package identity. 3. The Agent follows the Skill and runs `pip install cbridge-agent` or `cbridge update`. 4. The unverified package or update executes with the privileges of the Agent user. 5. Malicious code accesses local files, indexed documents, configuration, credentials available to that user, or performs further system actions. ### Impact Assessment Successful exploitati ...[truncated 479 chars]- Remediation
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Remediation Suggestions
- Pin
cbridge-agentto a specifically reviewed version rather than installing the latest available release. - Lock all transitive dependencies and require cryptographic hashes, such as through a reviewed requirements file and
pip --require-hashes. - Disable automatic updates. Require explicit user approval and security review before changing versions.
- Verify package provenance using signed releases, attestations, or reproducible builds that bind the registry artifact to a reviewed source commit.
- Install the dependency in an isolated virtual environment or restricted container under a dedicated, least-privileged account.
- Restrict the process to explicitly approved document directories and deny unnecessary network, credential, and filesystem access.
- Replace absolute trust claims such as “zero data leakage risk” with documented, verifiable security properties and limitations.
- Pin