Advisory details:
github_osv / GHSA-9q36-67vc-rrwg
| Advisory ID | github_osv/GHSA-9q36-67vc-rrwg |
| Aliases |
CVE-2026-27646
|
| Summary | OpenClaw: Sandboxed /acp spawn requests could initialize host ACP sessions ### Summary Sandboxed requester sessions could reach host-side ACP session initialization through `/acp spawn`. OpenClaw already blocked `sessions_spawn({ runtime: "acp" })` from sandboxed sessions, but the slash-command path initialized ACP directly without applying the same host-runtime guard first. ### Affected Packages / Versions - npm package: `openclaw` - Affected versions: `<= 2026.3.2` - Patched version: `>= 2026.3.7` ### Details ACP sessions run on the host, not inside the OpenClaw sandbox. The direct ACP spawn path in `src/agents/acp-spawn.ts` already denied sandboxed requesters, but `/acp spawn` in `src/auto-reply/reply/commands-acp/lifecycle.ts` called `initializeSession(...)` without first applying the same restriction. In affected versions, an already authorized sender in a sandboxed session could use `/acp spawn` to cross from sandboxed chat context into host-side ACP runtime initialization when ACP was enabled and a backend was available. ### Fix Commit(s) - `61000b8e4ded919ca1a825d4700db4cb3fdc56e3` ### Fix Details The fix introduced a shared ACP runtime-policy guard in `src/agents/acp-spawn.ts` and reused it from the `/acp spawn` handler in `src/auto-reply/reply/commands-acp/lifecycle.ts` before any ACP backend initialization. Regression coverage was added in `src/auto-reply/reply/commands-acp.test.ts` to prove sandboxed `/acp spawn` requests are rejected early, while existing ACP spawn behavior for non-sandboxed sessions remains unchanged. ### Release Process Note Patched version is pre-set to `2026.3.7` so the advisory can be published once that npm release is available. Thanks @tdjackey for reporting. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 5.5 |
| Risk | 2.8 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| CWE-284 | Improper Access Control |
| CWE-693 | Protection Mechanism Failure |
| CWE-863 | Incorrect Authorization |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 6.1 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-9q36-67vc-rrwg/GHSA-9q36-67vc-rrwg.json |
| cvssv4 | 5.8 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-9q36-67vc-rrwg/GHSA-9q36-67vc-rrwg.json |
| generic_textual | MODERATE |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/openclaw/openclaw | ||
| https://github.com/openclaw/openclaw/releases/tag/v2026.3.7 | ||
| 61000b8e4ded919ca1a825d4700db4cb3fdc56e3 | Other | https://github.com/openclaw/openclaw/commit/61000b8e4ded919ca1a825d4700db4cb3fdc56e3 |
| CVE-2026-27646 | https://nvd.nist.gov/vuln/detail/CVE-2026-27646 | |
| GHSA-9q36-67vc-rrwg | Advisory | https://github.com/openclaw/openclaw/security/advisories/GHSA-9q36-67vc-rrwg |
| openclaw-mar-sandbox-escape-via-acp-spawn-command | Advisory | https://vulncheck.com/advisories/openclaw-mar-sandbox-escape-via-acp-spawn-command |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:15:20Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/27xxx/CVE-2026-27646.json
Source Advisory: vulnrichment/CVE-2026-27646
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]