{"id":"GHSA-x7cf-6gp3-q5f8","summary":"Duplicate Advisory: MCP Streamable HTTP redirects could forward configured custom headers to another origin","details":"## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-rjxq-qqhf-8hwh. This link is maintained to preserve external references.\n\n## Original Description\nOpenClaw 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to attacker-controlled origins.","modified":"2026-09-10T03:51:09.674672288Z","published":"2026-06-16T21:31:57Z","withdrawn":"2026-06-17T17:54:46Z","database_specific":{"cwe_ids":["CWE-522"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-06-17T17:54:46Z","nvd_published_at":"2026-06-16T19:17:00Z"},"references":[{"type":"WEB","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-rjxq-qqhf-8hwh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53840"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/openclaw-custom-header-leakage-via-mcp-streamable-http-cross-origin-redirects"}],"affected":[{"package":{"name":"openclaw","ecosystem":"PyPI","purl":"pkg:pypi/openclaw"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.1","2.0.2"],"database_specific":{"last_known_affected_version_range":"\u003c 2026.5.12","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-x7cf-6gp3-q5f8/GHSA-x7cf-6gp3-q5f8.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"},{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}