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CVE-2026-43582

OpenClaw < 2026.4.10 - DNS Rebinding SSRF via Hostname Validation Bypass

4.9 MediumFix available

OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
None

Exploit likelihood

0.20%Up 0.2 points since May 7, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.9

OpenClaw < 2026.4.10 - DNS Rebinding SSRF via Hostname Validation Bypass

OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.

Record
CVE-2026-43582
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-367
Updated
2026-11-02
EUVDEUVD-2026-28176 4.9

OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.

Record
EUVD-2026-28176
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-w7rc-vvgx-pj45 4.9

Duplicate Advisory: OpenClaw: Browser SSRF hostname validation could be bypassed by DNS rebinding

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-xq94-r468-qwgj. This link is maintained to preserve external references.

Original Description

OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.

Record
GHSA-w7rc-vvgx-pj45
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/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
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-367
Updated
2026-11-02
GitHub AdvisoriesGHSA-xq94-r468-qwgj 4.9

OpenClaw: Browser SSRF hostname validation could be bypassed by DNS rebinding

Summary

Browser SSRF hostname validation could be bypassed by DNS rebinding.

Affected Packages / Versions

  • Package: openclaw
  • Ecosystem: npm
  • Affected versions: < 2026.4.10
  • Patched versions: >= 2026.4.10

Impact

Browser navigation policy could validate a hostname/IP resolution that differed from the address Chromium ultimately used, allowing DNS rebinding style SSRF pivots.

Technical Details

The fix tightens strict browser hostname navigation so unallowlisted hostname URLs fail closed under restrictive policy.

Fix

The issue was fixed in #64367. The first stable tag containing the fix is v2026.4.10, and [email protected] includes the fix.

Fix Commit(s)

  • 121c452d666d4749744dc2089287d0227aae2ed3
  • PR: #64367

Release Process Note

Users should upgrade to openclaw 2026.4.10 or newer. The latest npm release, 2026.4.14, already includes the fix.

Credits

Thanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.

Record
GHSA-xq94-r468-qwgj
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-350, CWE-918
Updated
2026-11-02
NVD 4.9

OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.

Record
CVE-2026-43582
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/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
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-367
Updated
2026-11-02
OSV 4.9

OpenClaw < 2026.4.10 - DNS Rebinding SSRF via Hostname Validation Bypass

OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.

Record
CVE-2026-43582
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Weakness
CWE-367
Updated
2026-11-02
OSVGHSA-w7rc-vvgx-pj45 4.9

Duplicate Advisory: OpenClaw: Browser SSRF hostname validation could be bypassed by DNS rebinding

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-xq94-r468-qwgj. This link is maintained to preserve external references.

Original Description

OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.

Record
GHSA-w7rc-vvgx-pj45
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/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
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-367
Updated
2026-11-02
OSVGHSA-xq94-r468-qwgj 4.9

OpenClaw: Browser SSRF hostname validation could be bypassed by DNS rebinding

Summary

Browser SSRF hostname validation could be bypassed by DNS rebinding.

Affected Packages / Versions

  • Package: openclaw
  • Ecosystem: npm
  • Affected versions: < 2026.4.10
  • Patched versions: >= 2026.4.10

Impact

Browser navigation policy could validate a hostname/IP resolution that differed from the address Chromium ultimately used, allowing DNS rebinding style SSRF pivots.

Technical Details

The fix tightens strict browser hostname navigation so unallowlisted hostname URLs fail closed under restrictive policy.

Fix

The issue was fixed in #64367. The first stable tag containing the fix is v2026.4.10, and [email protected] includes the fix.

Fix Commit(s)

  • 121c452d666d4749744dc2089287d0227aae2ed3
  • PR: #64367

Release Process Note

Users should upgrade to openclaw 2026.4.10 or newer. The latest npm release, 2026.4.14, already includes the fix.

Credits

Thanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.

Record
GHSA-xq94-r468-qwgj
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-350, CWE-918
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openclaw
npm
 before 2026.4.10
2026.4.10

History

History
RecordedChangedSources
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-43582 is a medium vulnerability (CVSS 4.9) in Openclaw, published April 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. Fixed in openclaw 2026.4.10.

References

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