{"answers":{"affected":"2 open source packages ship an affected version, including openclaw. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-42420 in the wild and no public exploit code.","fix":"Upgrade openclaw to 2026.4.8 or later.","what":"CVE-2026-42420 is a medium-severity denial of service vulnerability in Openclaw Openclaw, published on 28 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-42420 and fix it if it is affected.\n\nWhat it is: CVE-2026-42420 is a medium-severity denial of service vulnerability in Openclaw Openclaw, published on 28 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-42420 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- openclaw (npm): affected all versions; fixed in 2026.4.8\n- openclaw (npm): affected all versions; fixed in 2026.4.8\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-2026-42420/ (Markdown: https://insights.sbomify.com/CVE-2026-42420/index.md)","id":"CVE-2026-42420","markdown":"https://insights.sbomify.com/CVE-2026-42420/index.md","name":"CVE-2026-42420","record":{"aliases":["GHSA-ccx3-fw7q-rr2r","MINI-7pxp-4hcf-g4pc"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenClaw library","requires_auth":"low_privilege","summary":"Attackers can cause denial of service via memory exhaustion by sending crafted base64-encoded input to OpenClaw.","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":5.3,"severity":"medium","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"OpenClaw before 2026.4.8 contains improper input validation in base64 decode paths that allocate memory before enforcing decoded-size limits. Attackers can exploit multiple code paths to cause memory exhaustion or denial of service through crafted base64-encoded input.","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 2026.4.8 - Improper Base64 Decoding Size Validation","id":"CVE-2026-42420","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 2026.4.8 - WebSocket Session Persistence via Shared Gateway Token Rotation","id":"CVE-2026-42421"},"packages":[{"ecosystem":"npm","fixed":["2026.4.8"],"introduced":["0"],"last_affected":[],"package":"openclaw","purl":null,"source":"GHSA-ccx3-fw7q-rr2r"},{"ecosystem":"npm","fixed":["2026.4.8"],"introduced":["0"],"last_affected":[],"package":"openclaw","purl":"pkg:npm/openclaw","source":"GHSA-ccx3-fw7q-rr2r"}],"prev":{"headline":"WordPress Swish Migrate and Backup plugin \u003c= 1.4.0 - Sensitive Data Exposure vulnerability","id":"CVE-2026-42419"},"products":["OpenClaw"],"published":"2026-04-28","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-29","vendors":["OpenClaw"]},"summary":"Attackers can cause denial of service via memory exhaustion by sending crafted base64-encoded input to OpenClaw.","url":"https://insights.sbomify.com/CVE-2026-42420/"}