{"action":"Upgrade openclaw to 2026.5.12 or later.","affected":[{"fixed":"2026.5.12","introduced":"0"}],"component":"openclaw","cve_ids":["CVE-2026-53840"],"ecosystem":"npm","epss":0.00223,"exploited":false,"fixed_versions":["2026.5.12"],"ghsa_id":"GHSA-rjxq-qqhf-8hwh","id":"tcs_01M5KG9C15AESDQ3XG2SJA4QR7","modified_at":"2026-06-17T18:11:28.897834Z","published_at":"2026-06-17T17:55:06Z","references":["https://osv.dev/vulnerability/GHSA-rjxq-qqhf-8hwh","https://github.com/openclaw/openclaw/security/advisories/GHSA-rjxq-qqhf-8hwh","https://nvd.nist.gov/vuln/detail/CVE-2026-53840","https://github.com/openclaw/openclaw","https://www.vulncheck.com/advisories/openclaw-custom-header-leakage-via-mcp-streamable-http-cross-origin-redirects"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"GHSA-rjxq-qqhf-8hwh","url":"https://osv.dev/vulnerability/GHSA-rjxq-qqhf-8hwh"}],"summary":"OpenClaw: MCP Streamable HTTP redirects could forward configured custom headers to another origin"}