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Vulnerability · Published Aug 25, 2026 · Assigned by GitHub_M

CVE-2026-55609sublinear-time-solver: Arbitrary file write in consciousness-explorer / sublinear-time-solver MCP export_state

High 7.1

In plain English

A high-severity security flaw in sublinear-time-solver from ruvnet. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 93.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

sublinear-time-solver is a Rust and WebAssembly library for solving asymmetric diagonally dominant systems in sublinear time. Prior to consciousness-explorer 1.1.2 and sublinear-time-solver 1.6.0, the export_state and import_state tools in src/consciousness-explorer/mcp/server.js pass the attacker-controlled filepath parameter to filesystem operations in src/consciousness-explorer/index.js without restricting the destination or rejecting traversal. The saveVectorToFile and loadVectorFromFile tools in src/mcp/server.ts contain the same sink class through the file_path parameter. An attacker able to invoke the MCP tools can read, write, or overwrite any file accessible to the server process, causing confidentiality and integrity loss and possible service disruption. This issue is fixed in consciousness-explorer 1.1.2 and sublinear-time-solver 1.6.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmconsciousness-explorer1.1.2GHSA-xc9g-j69q-37xw
npmsublinear-time-solver1.6.0GHSA-xc9g-j69q-37xw

Affected products (as reported)

VendorProductVersions
ruvnet sublinear-time-solver < 1.6.0

Weakness: CWE-73 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

References