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CVE-2026-22181

OpenClaw < 2026.3.2 - DNS Pinning Bypass via Environment Proxy Configuration in web_fetch

6.1 MediumFix available

OpenClaw versions prior to 2026.3.2 contain a DNS pinning bypass vulnerability in strict URL fetch paths that allows attackers to circumvent SSRF guards when environment proxy variables are configured. When HTTP_PROXY, HTTPS_PROXY, or ALL_PROXY environment variables are present, attacker-influenced URLs can be routed through proxy behavior instead of pinned-destination routing, enabling access to internal targets reachable from the proxy environment.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
Low

Exploit likelihood

0.25%Up 0.2 points since Mar 18, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.1

OpenClaw < 2026.3.2 - DNS Pinning Bypass via Environment Proxy Configuration in web_fetch

OpenClaw versions prior to 2026.3.2 contain a DNS pinning bypass vulnerability in strict URL fetch paths that allows attackers to circumvent SSRF guards when environment proxy variables are configured. When HTTP_PROXY, HTTPS_PROXY, or ALL_PROXY environment variables are present, attacker-influenced URLs can be routed through proxy behavior instead of pinned-destination routing, enabling access to internal targets reachable from the proxy environment.

Record
CVE-2026-22181
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
7.6 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
Weakness
CWE-918
Updated
2026-11-02
EUVDEUVD-2026-12728 6.1

OpenClaw versions prior to 2026.3.2 contain a DNS pinning bypass vulnerability in strict URL fetch paths that allows attackers to circumvent SSRF guards when environment proxy variables are configured. When HTTP_PROXY, HTTPS_PROXY, or ALL_PROXY environment variables are present, attacker-influenced URLs can be routed through proxy behavior instead of pinned-destination routing, enabling access to internal targets reachable from the proxy environment.

Record
EUVD-2026-12728
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-8mvx-p2r9-r375 6.1

OpenClaw's web tools strict URL guard could lose DNS pinning when env proxy is configured

Summary

openclaw web tools strict URL fetch paths could lose DNS pinning when environment proxy variables are configured (HTTP_PROXY/HTTPS_PROXY/ALL_PROXY, including lowercase variants).

In affected builds, strict URL checks (for example web_fetch and citation redirect resolution) validated one destination during SSRF guard checks, but runtime connection routing could proceed through an env-proxy dispatcher.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Vulnerable version range: <= 2026.3.1
  • Latest published npm version at triage time (2026-03-02): 2026.3.1
  • Patched versions: >= 2026.3.2 (released)

Technical Details

The SSRF guard performed hostname resolution and policy checks, then selected a request dispatcher.

When env proxy settings were present, strict web-tool flows could use EnvHttpProxyAgent instead of the DNS-pinned dispatcher. This created a destination-binding gap between check-time resolution and connect-time routing.

The fix keeps DNS pinning on strict/untrusted web-tool URL paths and limits env-proxy bypass behavior to trusted/operator-controlled endpoints via an explicit dangerous opt-in.

Impact

In deployments with env proxy variables configured, attacker-influenced URLs from web tools could be routed through proxy behavior instead of strict pinned-destination routing, which could allow access to internal/private targets reachable from that proxy environment.

Mitigations

Before upgrading, operators can reduce exposure by clearing proxy env vars for OpenClaw runtime processes or disabling web_fetch / web_search where untrusted URL input is possible.

Fix Commit(s)

  • 345abf0b2e0f43b0f229e96f252ebf56f1e5549e
Record
GHSA-8mvx-p2r9-r375
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-367, CWE-918
Updated
2026-11-02
NVD 6.1

OpenClaw versions prior to 2026.3.2 contain a DNS pinning bypass vulnerability in strict URL fetch paths that allows attackers to circumvent SSRF guards when environment proxy variables are configured. When HTTP_PROXY, HTTPS_PROXY, or ALL_PROXY environment variables are present, attacker-influenced URLs can be routed through proxy behavior instead of pinned-destination routing, enabling access to internal targets reachable from the proxy environment.

Record
CVE-2026-22181
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/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
CVSS 3.1
7.6 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
Weakness
CWE-918
Updated
2026-11-02
OSV 6.1

OpenClaw < 2026.3.2 - DNS Pinning Bypass via Environment Proxy Configuration in web_fetch

OpenClaw versions prior to 2026.3.2 contain a DNS pinning bypass vulnerability in strict URL fetch paths that allows attackers to circumvent SSRF guards when environment proxy variables are configured. When HTTP_PROXY, HTTPS_PROXY, or ALL_PROXY environment variables are present, attacker-influenced URLs can be routed through proxy behavior instead of pinned-destination routing, enabling access to internal targets reachable from the proxy environment.

Record
CVE-2026-22181
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-918
Updated
2026-11-02
OSVGHSA-8mvx-p2r9-r375 6.1

OpenClaw's web tools strict URL guard could lose DNS pinning when env proxy is configured

Summary

openclaw web tools strict URL fetch paths could lose DNS pinning when environment proxy variables are configured (HTTP_PROXY/HTTPS_PROXY/ALL_PROXY, including lowercase variants).

In affected builds, strict URL checks (for example web_fetch and citation redirect resolution) validated one destination during SSRF guard checks, but runtime connection routing could proceed through an env-proxy dispatcher.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Vulnerable version range: <= 2026.3.1
  • Latest published npm version at triage time (2026-03-02): 2026.3.1
  • Patched versions: >= 2026.3.2 (released)

Technical Details

The SSRF guard performed hostname resolution and policy checks, then selected a request dispatcher.

When env proxy settings were present, strict web-tool flows could use EnvHttpProxyAgent instead of the DNS-pinned dispatcher. This created a destination-binding gap between check-time resolution and connect-time routing.

The fix keeps DNS pinning on strict/untrusted web-tool URL paths and limits env-proxy bypass behavior to trusted/operator-controlled endpoints via an explicit dangerous opt-in.

Impact

In deployments with env proxy variables configured, attacker-influenced URLs from web tools could be routed through proxy behavior instead of strict pinned-destination routing, which could allow access to internal/private targets reachable from that proxy environment.

Mitigations

Before upgrading, operators can reduce exposure by clearing proxy env vars for OpenClaw runtime processes or disabling web_fetch / web_search where untrusted URL input is possible.

Fix Commit(s)

  • 345abf0b2e0f43b0f229e96f252ebf56f1e5549e
Record
GHSA-8mvx-p2r9-r375
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-367, CWE-918
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openclaw
npm
 through 2026.3.1
2026.3.2
openclaw
npm
 before 2026.3.2
2026.3.2

History

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

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

In short

CVE-2026-22181 is a medium vulnerability (CVSS 6.1) in Openclaw, published March 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. Fixed in openclaw 2026.3.2.

References

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