{"answers":{"affected":"2 open source packages ship an affected version, including openclaw. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53840 in the wild and no public exploit code.","fix":"Upgrade openclaw to 2026.5.12 or later.","what":"CVE-2026-53840 is a medium-severity vulnerability in Openclaw Openclaw, published on 16 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53840 and fix it if it is affected.\n\nWhat it is: CVE-2026-53840 is a medium-severity vulnerability in Openclaw Openclaw, published on 16 Jun 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-2026-53840 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- openclaw (npm): affected all versions; fixed in 2026.5.12\n- openclaw (npm): affected all versions; fixed in 2026.5.12\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-2026-53840/ (Markdown: https://insights.sbomify.com/CVE-2026-53840/index.md)","id":"CVE-2026-53840","markdown":"https://insights.sbomify.com/CVE-2026-53840/index.md","name":"CVE-2026-53840","record":{"aliases":["GHSA-rjxq-qqhf-8hwh","MINI-fh23-xv78-h6xr"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"OpenClaw MCP server","requires_auth":"low_privilege","summary":"Attackers can exfiltrate sensitive custom headers, such as API keys, from OpenClaw MCP servers by exploiting cross-origin redirects in streamable HTTP connections.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"openclaw","vendor":"openclaw"}],"cvss":{"score":6,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-522","name":"Insufficiently Protected Credentials"}],"description":"OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers like API keys or tenant-routing credentials to attacker-controlled origins.","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 2026.5.12 - Custom Header Leakage via MCP Streamable HTTP Cross-Origin Redirects","id":"CVE-2026-53840","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"openclaw:openclaw","products":["openclaw:openclaw"],"type":"information_disclosure","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"OpenClaw \u003c 2026.5.12 - Cross-Site Scripting via Unsafe Markdown Links in Exported Session HTML","id":"CVE-2026-53841"},"packages":[{"ecosystem":"npm","fixed":["2026.5.12"],"introduced":["0"],"last_affected":[],"package":"openclaw","purl":null,"source":"GHSA-rjxq-qqhf-8hwh"},{"ecosystem":"npm","fixed":["2026.5.12"],"introduced":["0"],"last_affected":[],"package":"openclaw","purl":"pkg:npm/openclaw","source":"GHSA-rjxq-qqhf-8hwh"}],"prev":{"headline":"OpenClaw \u003c 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation","id":"CVE-2026-53839"},"products":["OpenClaw"],"published":"2026-06-16","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":"2026-06-16","vendors":["OpenClaw"]},"summary":"Attackers can exfiltrate sensitive custom headers, such as API keys, from OpenClaw MCP servers by exploiting cross-origin redirects in streamable HTTP connections.","url":"https://insights.sbomify.com/CVE-2026-53840/"}