{"answers":{"affected":"2 open source packages ship an affected version, including openclaw. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-35640 in the wild and no public exploit code.","fix":"Upgrade openclaw to 2026.3.28 or later.","what":"CVE-2026-35640 is a medium-severity denial of service vulnerability in Openclaw Openclaw, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-35640 and fix it if it is affected.\n\nWhat it is: CVE-2026-35640 is a medium-severity denial of service vulnerability in Openclaw Openclaw, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-35640 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- openclaw (npm): affected all versions; fixed in 2026.3.28\n- openclaw (npm): affected all versions; fixed in 2026.3.28\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-35640/ (Markdown: https://insights.sbomify.com/CVE-2026-35640/index.md)","id":"CVE-2026-35640","markdown":"https://insights.sbomify.com/CVE-2026-35640/index.md","name":"CVE-2026-35640","record":{"aliases":["GHSA-3h52-cx59-c456","MINI-8hm8-xfcg-qxj6"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenClaw webhook service","requires_auth":"none","summary":"Unauthenticated attackers can cause denial of service by sending malicious webhook requests that trigger resource-intensive JSON parsing before signature validation.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"openclaw","vendor":"openclaw"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-696","name":"Incorrect Behavior Order"}],"description":"OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook signatures, allowing unauthenticated attackers to force resource-intensive parsing operations. Remote attackers can send malicious webhook requests to trigger denial of service by exhausting server resources through forced JSON parsing before signature rejection.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"OpenClaw \u003c 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing","id":"CVE-2026-35640","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"openclaw:openclaw","products":["openclaw:openclaw"],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"OpenClaw \u003c 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installation","id":"CVE-2026-35641"},"packages":[{"ecosystem":"npm","fixed":["2026.3.28"],"introduced":["0"],"last_affected":[],"package":"openclaw","purl":null,"source":"GHSA-3h52-cx59-c456"},{"ecosystem":"npm","fixed":["2026.3.28"],"introduced":["0"],"last_affected":[],"package":"openclaw","purl":"pkg:npm/openclaw","source":"GHSA-3h52-cx59-c456"}],"prev":{"headline":"OpenClaw \u003c 2026.3.22 - Privilege Escalation via device.pair.approve Scope Validation","id":"CVE-2026-35639"},"products":["OpenClaw"],"published":"2026-04-09","related":[{"cvss_score":9.9,"headline":"Security feature bypass in OpenClaw","id":"CVE-2026-28363","kev_date_added":null,"published":"2026-02-27"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2026-30741","kev_date_added":null,"published":"2026-03-11"},{"cvss_score":9.4,"headline":"OpenClaw \u003c 2026.3.28 - Privilege Escalation via Missing Caller Scope Validation in Device Pair Approval","id":"CVE-2026-33579","kev_date_added":null,"published":"2026-03-31"},{"cvss_score":9.4,"headline":"OpenClaw \u003c 2026.3.11 - Privilege Escalation via Unvalidated Scope in device.token.rotate","id":"CVE-2026-32922","kev_date_added":null,"published":"2026-03-29"},{"cvss_score":9.4,"headline":"OpenClaw \u003c 2026.3.11 - Approval Bypass via Unrecognized Script Runners","id":"CVE-2026-32978","kev_date_added":null,"published":"2026-03-29"},{"cvss_score":9.4,"headline":"OpenClaw \u003c 2026.3.12 - Scope Elevation in WebSocket Shared-Auth Connections","id":"CVE-2026-22172","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":9.4,"headline":"OpenClaw \u003c 2026.2.14 - Remote Code Execution via Node Invoke Approval Bypass","id":"CVE-2026-28466","kev_date_added":null,"published":"2026-03-05"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-23","vendors":["OpenClaw"]},"summary":"Unauthenticated attackers can cause denial of service by sending malicious webhook requests that trigger resource-intensive JSON parsing before signature validation.","url":"https://insights.sbomify.com/CVE-2026-35640/"}