---
title: "CVE-2026-8634: Crabbox: environment variable exposure vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-8634/
description: "CVE-2026-8634 (github.com/openclaw/crabbox (Go)): Crabbox prior to v0.12.0 contains an environment variable exposure vulnerability that allows attackers…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-14
date_modified: 2026-10-08
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-8634"
kev: false
cvss: 9.3
epss: 0.01037
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-8634: Crabbox: environment variable exposure vulnerability

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.0% , percentile 64: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 64% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/openclaw/crabbox (Go) < 0.12.0, fixed in 0.12.0 . Check your lockfile, including transitive dependencies.

## What it is

Crabbox prior to v0.12.0 contains an environment variable exposure vulnerability that allows attackers with access to a malicious or compromised repository to forward local secrets such as API tokens, cloud credentials, and broker tokens into the remote command environment. Attackers can exploit overly permissive environment variable allowlisting in repo-local Crabbox configuration to serialize sensitive environment variables into remote command execution, exposing credentials to the remote environment.

## Affected packages

- Go `github.com/openclaw/crabbox` < 0.12.0 → fixed: 0.12.0

## Affected products (CVE record)

- openclaw crabbox: < 0.12.0

## Severity

- VulnCheck CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`
- VulnCheck CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.04% probability of exploitation activity in the next 30 days; percentile 64.

## Sources

- [github.com](https://github.com/openclaw/crabbox/releases/tag/v0.12.0)
- [github.com](https://github.com/openclaw/crabbox/commit/eaae40ae4ce009e60633f16f7f19600c74557f6f)
- [GitHub Advisory GHSA-fm77-94qm-4894](https://github.com/advisories/GHSA-fm77-94qm-4894)
- [CVE.org record CVE-2026-8634](https://www.cve.org/CVERecord?id=CVE-2026-8634)
- [NVD entry CVE-2026-8634](https://nvd.nist.gov/vuln/detail/CVE-2026-8634)
- [github.com](https://github.com/openclaw/crabbox/pull/78)
- [vulncheck.com](https://www.vulncheck.com/advisories/crabbox-environment-variable-information-disclosure)

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Source page: https://erroneo.us/security/cve/CVE-2026-8634/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt