BREW-openclaw-cli-GHSA-5847-rm3g-23mw — OpenClaw has hook auth rate limiter bypass via IPv4-mapped IPv6 client key variants

Affected: Homebrew: openclaw-cli

## Vulnerability

The hook authentication throttle keyed failed attempts by raw socket `remoteAddress` text.

IPv4 and IPv4-mapped IPv6 forms of the same client (for example `1.2.3.4` and `::ffff:1.2.3.4`) were treated as different clients, allowing separate rate-limit buckets.

## Impact

An attacker could split failed hook-auth attempts across both address forms and effectively double the brute-force budget from 20 to 40 attempts per 60-second window.

## Affected Components

- `src/gateway/server-http.ts` - `src/gateway/auth-rate-limit.ts`

## Affected Packages / Versions

- Package: `openclaw` (npm) - Vulnerable versions: `<= 2026.2.21-2` - Patched version (planned next release): `2026.2.22`

## Remediation

Centralize and reuse canonical client-IP normalization for auth rate-limiting, and use that canonical key for hook auth throttling.

## Fix Commit(s)

- `3284d2eb227e7b6536d543bcf5c3e320bc9d13c5`

## Release Process Note

`patched_versions` is pre-set to the planned next release (`2026.2.22`) so once npm release `2026.2.22` is published, this advisory can be published directly.

OpenClaw thanks @aether-ai-agent for reporting.

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BREW-openclaw-cli-GHSA-5847-rm3g-23mw — OpenClaw has hook auth rate limiter bypass via IPv4-mapped IPv6 client key variants