---
title: "CVE-2026-41329: OpenClaw: Heartbeat context inheritance bypasses sandbox via senderIsOwner escalation"
url: https://erroneo.us/security/cve/CVE-2026-41329/
description: "CVE-2026-41329 (openclaw (npm)): OpenClaw before 2026.3.31 contains a sandbox bypass vulnerability allowing attackers to escalate privileges via heartbeat…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-04-20
date_modified: 2026-04-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-41329"
kev: false
cvss: 9
epss: 0.00516
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-41329: OpenClaw: Heartbeat context inheritance bypasses sandbox via senderIsOwner escalation

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.5% , percentile 43: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 43% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes openclaw (npm) <= 2026.3.28, fixed in 2026.3.31 . Check your lockfile, including transitive dependencies.

## What it is

OpenClaw before 2026.3.31 contains a sandbox bypass vulnerability allowing attackers to escalate privileges via heartbeat context inheritance and senderIsOwner parameter manipulation. Attackers can exploit improper context validation to bypass sandbox restrictions and achieve unauthorized privilege escalation.

## Affected packages

- npm `openclaw` <= 2026.3.28 → fixed: 2026.3.31

## Affected products (CVE record)

- OpenClaw OpenClaw: < 2026.3.31

## Severity

- VulnCheck CVSS 4.0: 9 `CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- VulnCheck CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 4.0: 9.0 `CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.52% probability of exploitation activity in the next 30 days; percentile 43.

## Sources

- [GitHub Security Advisory (GHSA-g5cg-8x5w-7jpm)](https://github.com/openclaw/openclaw/security/advisories/GHSA-g5cg-8x5w-7jpm)
- [Patch Commit](https://github.com/openclaw/openclaw/commit/a30214a624946fc5c85c9558a27c1580172374fd)
- [GitHub Advisory GHSA-g5cg-8x5w-7jpm](https://github.com/advisories/GHSA-g5cg-8x5w-7jpm)
- [CVE.org record CVE-2026-41329](https://www.cve.org/CVERecord?id=CVE-2026-41329)
- [NVD entry CVE-2026-41329](https://nvd.nist.gov/vuln/detail/CVE-2026-41329)
- [VulnCheck Advisory: OpenClaw < 2026.3.31 - Sandbox Bypass via Heartbeat Context Inheritance and senderIsOwner Escalation](https://www.vulncheck.com/advisories/openclaw-sandbox-bypass-via-heartbeat-context-inheritance-and-senderisowner-escalation)
- [github.com](https://github.com/openclaw/openclaw/releases/tag/v2026.3.31)

---
Source page: https://erroneo.us/security/cve/CVE-2026-41329/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt