Advisory details:
github_osv / GHSA-6c9j-x93c-rw6j
| Advisory ID | github_osv/GHSA-6c9j-x93c-rw6j |
| Aliases |
CVE-2026-4040
|
| Summary | OpenClaw safeBins file-existence oracle information disclosure An information disclosure vulnerability in OpenClaw's `tools.exec.safeBins` approval flow allowed a file-existence oracle. When safe-bin validation examined candidate file paths, command allow/deny behavior could differ based on whether a path already existed on the host filesystem. An attacker could probe for file presence by comparing outcomes for existing vs non-existing filenames. ## Affected Packages / Versions - Package: `openclaw` (npm) - Affected versions: `<= 2026.2.17` - Latest published vulnerable version at triage time: `2026.2.17` - Planned patched version: `2026.2.18` ## Impact Attackers with access to this execution surface could infer whether specific files exist (for example secrets/config files), enabling filesystem enumeration and improving follow-on attack planning. ## Fix The safe-bin policy was changed to deterministic argv-only validation without host file-existence checks. File-oriented flags are blocked for safe-bin mode (for example `sort -o`, `jq -f`, `grep -f`), and trusted-path checks remain enforced. ## Fix Commit(s) - `bafdbb6f112409a65decd3d4e7350fbd637c7754` Found using [MCPwner](https://github.com/Pigyon/MCPwner) Thanks @nedlir for reporting. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 3.9 |
| Risk | 1.9 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| CWE-203 | Observable Discrepancy |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 4.3 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-6c9j-x93c-rw6j/GHSA-6c9j-x93c-rw6j.json |
| generic_textual | MODERATE |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/openclaw/openclaw | ||
| https://github.com/openclaw/openclaw/commit/bafdbb6f112409a65decd3d4e7350fbd637c7754 | ||
| CVE-2026-4040 | https://nvd.nist.gov/vuln/detail/CVE-2026-4040 | |
| GHSA-6c9j-x93c-rw6j | https://github.com/openclaw/openclaw/security/advisories/GHSA-6c9j-x93c-rw6j |
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 |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-12T13:08:04Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/4xxx/CVE-2026-4040.json
Source Advisory: vulnrichment/CVE-2026-4040
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]