GHSA-hr5v-j9h9-xjhg

Fixed in OpenClaw 2026.3.24, the current shipping release.

Advisory Details

Title: Sandbox Media Root Bypass via Unnormalized mediaUrl / fileUrl Parameter Keys (CWE-22)

Description:

Summary

A path traversal vulnerability in the agent sandbox enforcement allows a sandboxed agent to read arbitrary files from other agents' workspaces by using the mediaUrl or fileUrl parameter key in message tool calls. The normalizeSandboxMediaParams function only checks ["media", "path", "filePath"] keys, while mediaUrl and fileUrl escape normalization entirely. Combined with handlePluginAction dropping mediaLocalRoots from the dispatch context, this enables a full sandbox escape where any agent can read files outside its designated sandbox root.

Details

The vulnerability exists in two files within the messaging pipeline:

1. Incomplete parameter key coverage in normalizeSandboxMediaParams:

In src/infra/outbound/message-action-params.ts, the function iterates over a hardcoded allowlist of parameter keys to validate:

// Line 212
const mediaKeys: Array<"media" | "path" | "filePath"> = ["media", "path", "filePath"];

The mediaUrl and fileUrl parameter keys are not included in this array. These keys are actively used by multiple channel extensions (Discord, Telegram, Slack, Matrix, Twitch) for media attachment handling, but they completely bypass the sandbox path validation performed by resolveSandboxedMediaSource.

2. Dropped mediaLocalRoots in handlePluginAction:

In src/infra/outbound/message-action-runner.ts, the handlePluginAction function dispatches actions to channel plugins but omits mediaLocalRoots from the context:

// Lines 684-697
const handled = await dispatchChannelMessageAction({
    channel,
    action,
    cfg,
    params,
    accountId: accountId ?? undefined,
    requesterSenderId: input.requesterSenderId ?? undefined,
    sessionKey: input.sessionKey,...