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NVD / CVE Program· CNA VulnCheck

CVE-2026-43575: OpenClaw 2026.2.21 < 2026.4.10 - Authentication Bypass in Sandbox noVNC Helper Route

Noroxi assessment

Priority: Monitor (action score 36/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: OpenClaw OpenClaw 2026.4.10.

Low priority for now. Upgrade to OpenClaw OpenClaw 2026.4.10 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

OpenClaw versions 2026.2.21 before 2026.4.10 contain an authentication bypass vulnerability in the sandbox noVNC helper route that exposes interactive browser session credentials. Attackers can access the noVNC helper route without bridge authentication to gain unauthorized access to the interactive browser session.

CriticalCVSS 9.2 · v4.0—No exploit Fix available
Published
May 6, 2026
Updated
Jun 17, 2026
EPSS
0.4% · 34th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
9.2
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-43575

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
openclawopenclaw

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • openclaw openclaw2026.2.21 and later · before 2026.4.10

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenClaw OpenClaw

    • 2026.4.10not affected
    • 2026.2.21 and later · before 2026.4.10affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
npmopenclawfrom 2026.2.21 · before 2026.4.102026.4.10

Same product

openclaw: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-25253OpenClaw (aka clawdbot or Moltbot) before 2026.1.29 obtains a gatewayUrl value from a query string and automatically makes a WebSocket conne
    45Plan
  • CVE-2026-30741A remote code execution (RCE) vulnerability in OpenClaw Agent Platform v2026.2.6 allows attackers to execute arbitrary code via a Request-Si
    39Monitor
  • CVE-2026-43534OpenClaw < 2026.4.10 - Unsanitized External Input in Agent Hook Events
    37Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-43573May 5, 2026 · OpenClaw < 2026.4.10 - SSRF Policy Bypass in Existing-Session Browser Interaction Routes
    19Monitor
  • ← EarlierCVE-2026-43574May 5, 2026 · OpenClaw < 2026.4.12 - Improper Authorization via Empty Approver Lists
    24Monitor
  • Later →CVE-2026-43576May 6, 2026 · OpenClaw < 2026.4.5 - Second-hop SSRF via CDP /json/version WebSocket URL
    19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
OpenClaw OpenClaw2026.4.10Vendor (CNA)
npm:openclaw2026.4.10Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-2217247 days apartOpenClaw < 2026.3.12 - Scope Elevation in WebSocket Shared-Auth Connections
    37Monitor
  • CVE-2026-413948 days apartOpenClaw < 2026.3.31 - Unauthorized Operator Scope Access in Unauthenticated Plugin-Auth Routes
    35Monitor
  • CVE-2026-4134913 days apartOpenClaw < 2026.3.28 - Agentic Consent Bypass via config.patch
    34Monitor
  • CVE-2026-3290523 days apartOpenClaw < 2026.5.4 - Unauthorized Device-Pairing Bootstrap Code Issuance via Chat Command
    34Monitor
  • CVE-2026-5381636 days apartOpenClaw < 2026.5.18 - Exec Lifecycle Event Forgery via Paired Node
    34Monitor
  • CVE-2026-5382137 days apartOpenClaw < 2026.5.18 - Scope Elevation in trusted-proxy Control UI WebSocket
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-435271 days apartOpenClaw < 2026.4.14 - Server-Side Request Forgery via Private Network Navigation
    25Monitor
  • CVE-2026-435760 days apartOpenClaw < 2026.4.5 - Second-hop SSRF via CDP /json/version WebSocket URL
    19Monitor
  • CVE-2026-435800 days apartOpenClaw < 2026.4.10 - Incomplete Navigation Guard Coverage in Browser Interactions
    19Monitor
  • CVE-2026-435820 days apartOpenClaw < 2026.4.10 - DNS Rebinding SSRF via Hostname Validation Bypass
    19Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-862 · Missing Authorization

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

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References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records