Vulnerability-Lookup

GHSA-F44P-C7W9-7XR7

Vulnerability from github – Published: 2026-03-31 23:54 – Updated: 2026-04-28 18:22

Summary

OpenClaw: Gateway WebSocket Denial of Service via unbounded pre-auth upgrades

Details

Summary

The gateway accepted unbounded concurrent unauthenticated WebSocket upgrades before allocating them to an authenticated session budget.

Impact

An unauthenticated network attacker could consume socket and worker capacity and disrupt WebSocket availability for legitimate clients.

Affected Component

src/gateway/server-http.ts, src/gateway/server/preauth-connection-budget.ts

Fixed Versions

Affected: <= 2026.3.24
Patched: >= 2026.3.28
Latest stable 2026.3.28 contains the fix.

Fix

Fixed by commit cb5f7e201f (gateway: cap concurrent pre-auth websocket upgrades).

Discovered by：Topsec AlphaLab (wang dong)

Severity

5.3 (Medium)


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

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.3.24"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.3.28"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41399"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-31T23:54:00Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nThe gateway accepted unbounded concurrent unauthenticated WebSocket upgrades before allocating them to an authenticated session budget.\n\n## Impact\n\nAn unauthenticated network attacker could consume socket and worker capacity and disrupt WebSocket availability for legitimate clients.\n\n## Affected Component\n\n`src/gateway/server-http.ts, src/gateway/server/preauth-connection-budget.ts`\n\n## Fixed Versions\n\n- Affected: `\u003c= 2026.3.24`\n- Patched: `\u003e= 2026.3.28`\n- Latest stable `2026.3.28` contains the fix.\n\n## Fix\n\nFixed by commit `cb5f7e201f` (`gateway: cap concurrent pre-auth websocket upgrades`).\n\nDiscovered by\uff1aTopsec AlphaLab (wang dong)",
  "id": "GHSA-f44p-c7w9-7xr7",
  "modified": "2026-04-28T18:22:27Z",
  "published": "2026-03-31T23:54:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/cb5f7e201f3f86ad70e199ef850e636b4cc457ba"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: Gateway WebSocket Denial of Service via unbounded pre-auth upgrades"
}

CVE-2026-41399 (GCVE-0-2026-41399)

Vulnerability from cvelistv5 – Published: 2026-04-28 18:09 – Updated: 2026-04-29 12:51 X_Open Source

Title

OpenClaw < 2026.3.28 - Denial of Service via Unbounded Pre-auth WebSocket Upgrades

Summary

OpenClaw before 2026.3.28 accepts unbounded concurrent unauthenticated WebSocket upgrades without pre-authentication budget allocation. Unauthenticated network attackers can exhaust socket and worker capacity to disrupt WebSocket availability for legitimate clients.

Severity

8.7 (High)


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

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/openclaw/openclaw/security/adv…	vendor-advisory
https://www.vulncheck.com/advisories/openclaw-den…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
OpenClaw	OpenClaw	Affected: 0 , < 2026.3.28 (semver) Unaffected: 2026.3.28 (semver)

Date Public

2026-03-29 00:00

Credits

wang dong (@topsec-bunney)

Show details on NVD website

JSON

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  "containers": {
    "adp": [
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        "metrics": [
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                "id": "CVE-2026-41399",
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-29T12:51:06.683948Z",
                "version": "2.0.3"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-F44P-C7W9-7XR7

Summary

Impact

Affected Component

Fixed Versions

Fix

CVE-2026-41399 (GCVE-0-2026-41399)

Tags

Sightings

Nomenclature