CVE-2026-88938: Path Traversal (CVSS 6.5)

Description

knowns through 0.33.0 fails to confine the path argument of the code.find MCP tool to the project root, allowing AI agent sessions to read source files anywhere on the host. Attackers can supply absolute paths or relative traversal sequences to the path argument and retrieve full file contents from outside the intended project directory.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0033

Probability of exploitation

0.26%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal

References

Other References

https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/mcp/handlers/code.go#L1293-L1354 https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/mcp/handlers/code.go#L873-L902 https://github.com/knowns-dev/knowns/security/advisories/GHSA-5cj9-fcqq-g2h7 https://www.vulncheck.com/advisories/knowns-through-0.33.0-path-traversal-via-code-find-mcp-tool https://github.com/knowns-dev/knowns/security/advisories/GHSA-5cj9-fcqq-g2h7

Frequently Asked Questions

What is CVE-2026-88938? +

knowns through 0.33.0 fails to confine the path argument of the code.find MCP tool to the project root, allowing AI agent sessions to read source files anywhere on the host. Attackers can supply absolute paths or relative traversal sequences to the path argument and retrieve full file contents from outside the intended project directory. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-88938? +

CVE-2026-88938 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0033, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-88938? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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