CVE-2026-43576

Description

OpenClaw before 2026.4.5 contains a server-side request forgery vulnerability in the CDP /json/version WebSocket endpoint that allows attackers to pivot to untrusted second-hop targets. The webSocketDebuggerUrl response field is not properly validated, enabling attackers to redirect connections to arbitrary hosts and perform SSRF-style attacks.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: MEDIUM
CVSS score: 4.9 / 10
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Effective score: 4.9 / 10 MEDIUM source: CNA overview
CWE(s): CWE-601, CWE-918
Reserved: 2026-05-01
Published: 2026-05-06 21:49 UTC
Last updated: 2026-05-07 14:30 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43576.json
Linked Threat: CVE-2026-43576 — CVE-2026-43576

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-06 20:16:33 UTC
NVD last modified: 2026-05-07 17:04:04 UTC
NVD CVSS v3.1: 7.7 / 10 HIGH source: disclosure@vulncheck.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Exploitability subscore: 3.1 / 10
Impact subscore: 4.0 / 10
EPSS score: 0.0003 (probability of exploitation in next 30 days)
EPSS percentile: 9.98% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-28164
Assigner: VulnCheck
Published: May 6, 2026, 7:49:20 PM
Updated: May 7, 2026, 12:30:31 PM
EUVD base score (CVSS 4.0): 4.9 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
EUVD-reported EPSS: 0.0300
Vendors: OpenClaw
Products: OpenClaw

OpenClaw (0 <2026.4.5)

ENISA description: OpenClaw before 2026.4.5 contains a server-side request forgery vulnerability in the CDP /json/version WebSocket endpoint that allows attackers to pivot to untrusted second-hop targets. The webSocketDebuggerUrl response field is not properly validated, enabling attackers to redirect connections to arbitrary hosts and perform SSRF-style attacks.

EUVD references (3)

Affected products (1)

Vendor	Product	Versions	Platforms
OpenClaw	OpenClaw	`0` (affected), `2026.4.5` (unaffected)	—

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

Vendor references (3)

References embedded in the original CVE record by the assigning CNA.

GitHub Security Advisory (GHSA-f7fh-qg34-x2xh) vendor-advisory
Patch Commit patch
VulnCheck Advisory: OpenClaw < 2026.4.5 - Second-hop SSRF via CDP /json/version WebSocket URL third-party-advisory

MITRE references (3) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Patch Commit patch
GitHub Security Advisory (GHSA-f7fh-qg34-x2xh) vendor-advisory
VulnCheck Advisory: OpenClaw < 2026.4.5 - Second-hop SSRF via CDP /json/version WebSocket URL third-party-advisory

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://nvd.nist.gov/vuln/detail/CVE-2026-43576 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-43576 tenable:www.cve.org
https://www.first.org/epss/ tenable:www.first.org

NVD-tagged references (3)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/openclaw/openclaw/commit/bc356cc8c2beaa747c71dd86cceab8f804699665 disclosure@vulncheck.com Patch
https://github.com/openclaw/openclaw/security/advisories/GHSA-f7fh-qg34-x2xh disclosure@vulncheck.com MitigationVendor Advisory
https://www.vulncheck.com/advisories/openclaw-second-hop-ssrf-via-cdp-json-version-websocket-url disclosure@vulncheck.com Third Party Advisory

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Zero-Day Threat Report May 2026 - CVEs, Exploits & Remediation ...

web:carthageelectronics.com

Status: Actively exploited — CISA KEV listed — patch by May 12, 2026 What Happened On April 28, 2026 , CISA added CVE - 2026 -32202 to its Known Exploited Vulnerabilities (KEV) catalog with a federal remediation deadline of May 12, 2026 . This vulnerability is the result of an incomplete patch Microsoft released in February for CVE - 2026 -21510.

2026-05-23 21:09 UTC
Patch Tuesday, May 2026 Edition - Krebs on Security

web:krebsonsecurity.com

Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.

2026-05-23 21:09 UTC
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897

web:techcommunity.microsoft.com

We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE - 2026 -42897.

2026-05-23 21:09 UTC
CVE-2026-43576 Observation Footprint | Bitsight

web:www.bitsight.com

Find CVE-2026-43576 country and industry Internet observation data, via Bitsight's Groma Internet scanner.

2026-05-23 21:09 UTC
Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days

web:www.bleepingcomputer.com

Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.

2026-05-23 21:09 UTC
Microsoft Confirms Active 0-Day Exploit—Check Emergency Mitigation

web:www.forbes.com

Microsoft Exchange users are urged to mitigate a zero-day vulnerability that CISA has confirmed is under active exploitation.

2026-05-23 21:09 UTC
Microsoft May 2026 Patch Tuesday: Many fixes, but no zero-days

web:www.helpnetsecurity.com

Microsoft has marked May 2026 Patch Tuesday by releasing fixes for 120+ CVE -numbered vulnerabilities, none of which are actively exploited.

2026-05-23 21:09 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-23 21:09 UTC
CVE 2026 — The Vulnerabilities That Matter Most Right Now

web:www.penligent.ai

Second, chipset and OEM dependencies make remediation slower and messier than software-only patching. Google's bulletin explains the two Android patch levels for March 2026 and clarifies that devices with security patch levels of 2026 -03-01 or 2026 -03-05 are protected against the associated issues, depending on applicable components.

2026-05-23 21:09 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-23 21:09 UTC
CVE-2025-43576 - Exploits & Severity - Feedly

web:feedly.com

A patch is available through Adobe's security advisory APSB25-57, released on June 27, 2025. Affected versions include Acrobat and Acrobat Reader DC (continuous) from 15.008.20082 to 25.001.20531, and classic versions from 20.001.30002 to 20.005.30774.

2026-05-26 02:49 UTC
Patch Tuesday, April 2026 Edition - Krebs on Security

web:krebsonsecurity.com

Microsoft today pushed software updates to fix a staggering 167 security vulnerabilities in its Windows operating systems and related software, including a SharePoint Server zero-day and a ...

2026-05-26 02:49 UTC
Patch - patch

web:patchnashville.com

Patch was born out of a love of children's fashion and classic yet modern gifting. The goal was to create a timeless yet modern boutique with a playful touch featuring children's clothing, gifts, & accessories. My hope is that you always find what you came for and feel as inspired by our collections as we are.

2026-05-26 02:49 UTC
SAP Security Patch Day - May 2026

web:support.sap.com

SAP security Patch Day Bulletin

2026-05-26 02:49 UTC
Microsoft Patch Tuesday, April 2026 Security Update Review

web:threatprotect.qualys.com

Zero-day Vulnerabilities Patched in April Patch Tuesday Edition CVE - 2026 -33825: Microsoft Defender Elevation of Privilege Vulnerability Microsoft Defender is a comprehensive, AI-powered security suite that provides malware protection, phishing detection, and web protection for individuals and businesses.

2026-05-26 02:49 UTC
May 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.

2026-05-26 02:49 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-05-26 02:49 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43576.json.

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