Vulnerability · Published Aug 27, 2026 · Assigned by VulDB

CVE-2026-81486bsmi021 mcp-file-context-server Path Resolution index.ts read_context path traversal

Medium 5.3

In plain English

A medium-severity path traversal in mcp-file-context-server from bsmi021. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.7%top 47.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was detected in bsmi021 mcp-file-context-server 1.0.0. Affected by this issue is the function read_context of the file src/index.ts of the component Path Resolution. Performing a manipulation of the argument path results in path traversal. It is possible to initiate the attack remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products (as reported)

Vendor	Product	Versions
bsmi021	mcp-file-context-server	1.0.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

References

VDB-395980 | bsmi021 mcp-file-context-server Path Resolution index.ts read_context path traversal vdb-entry, technical-description
VDB-395980 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-81486 | CVE Analysis and Report third-party-advisory
Submit #887137 | bsmi021 mcp-file-context-server 1.0.0 Arbitrary File Read third-party-advisory
https://github.com/bsmi021/mcp-file-context-server/issues/15 exploit, issue-tracking
https://github.com/bsmi021/mcp-file-context-server/ product