Advisory details:
github_osv / GHSA-p536-vvpp-9mc8
| Advisory ID | github_osv/GHSA-p536-vvpp-9mc8 |
| Aliases |
CVE-2026-28394
|
| Summary | OpenClaw has a Web Fetch DoS via unbounded response parsing ### Summary The `web_fetch` tool could be used to crash the OpenClaw Gateway process (OOM / resource exhaustion) by fetching and attempting to parse attacker-controlled web pages with oversized response bodies or pathological HTML nesting. ### Affected Packages / Versions - Package: `openclaw` (npm) - Affected versions: `<= 2026.2.14` - Fixed versions: `>= 2026.2.15` ### Impact An attacker can social-engineer a user (or any automation that uses `web_fetch`) into fetching a malicious URL that returns extremely large or deeply nested HTML. The Gateway may exhaust memory or become unresponsive, causing a denial of service. ### Fix The Gateway now caps the downloaded response body size before any HTML parsing and adds additional guards to avoid running Readability/DOM parsing on pathological HTML. ### Fix Commit(s) - 166cf6a3e04c7df42bea70a7ad5ce2b9df46d147 ### Release Process Note This advisory is prepared for the next npm release. Once `openclaw@2026.2.15` is published, publish this advisory without further edits. Thanks @xuemian168 for reporting. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 5.9 |
| Risk | 3.0 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 6.5 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-p536-vvpp-9mc8/GHSA-p536-vvpp-9mc8.json |
| generic_textual | MODERATE |
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/2026-03-11T13:34:58Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/28xxx/CVE-2026-28394.json
Source Advisory: vulnrichment/CVE-2026-28394
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]