{"answers":{"affected":"3 open source packages ship an affected version, including https://github.com/dadrus/heimdall and github.com/dadrus/heimdall.","exploited":"There is no known exploitation of CVE-2026-57210 in the wild and no public exploit code.","fix":"Upgrade https://github.com/dadrus/heimdall to 0.17.17 or later.","what":"CVE-2026-57210 is a high-severity vulnerability in dadrus heimdall, published on 23 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-57210 and fix it if it is affected.\n\nWhat it is: CVE-2026-57210 is a high-severity vulnerability in dadrus heimdall, published on 23 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-57210 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- https://github.com/dadrus/heimdall (Go): affected all versions; fixed in 0.17.17\n- https://github.com/dadrus/heimdall (Go): affected all versions; fixed in 0.17.17\n- github.com/dadrus/heimdall (Go): affected all versions; fixed in 0.17.17\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-2026-57210/ (Markdown: https://insights.sbomify.com/CVE-2026-57210/index.md)","id":"CVE-2026-57210","markdown":"https://insights.sbomify.com/CVE-2026-57210/index.md","name":"CVE-2026-57210","record":{"aliases":["GHSA-38x9-25wx-7fg2","GO-2026-5075"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"},{"id":"CWE-20","name":"Improper Input Validation"},{"id":"CWE-116","name":"Improper Encoding or Escaping of Output"}],"description":"Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.17, when the trusted_proxies option is configured, heimdall extracts client IP addresses from the Forwarded (for= parameter) and X-Forwarded-For headers and exposes them as Request.ClientIPAddresses to the rule pipeline. However, extracted values are not validated to be syntactically valid IP addresses. Arbitrary strings, malformed IP literals, and RFC 7239 unknown values and obfuscated identifiers are accepted without further checks. In addition, the Forwarded header parser splits on , and ; without accounting for RFC 7239 quoted strings, which can cause a single quoted value to be parsed as multiple entries, with fragments — including trailing quote characters — treated as independent addresses. This issue has been patched in version 0.17.17.","ecosystems":["Go"],"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":"Heimdall: IP Spoofing via Unvalidated Forwarding Headers","id":"CVE-2026-57210","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":null,"year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"RabbitMQ: UNC SSRF affecting the management UI on Windows","id":"CVE-2026-57211"},"packages":[{"ecosystem":"Go","fixed":["0.17.17"],"introduced":["0"],"last_affected":[],"package":"github.com/dadrus/heimdall","purl":"pkg:golang/github.com/dadrus/heimdall","source":"GO-2026-5075"},{"ecosystem":"Go","fixed":["0.17.17"],"introduced":["0"],"last_affected":[],"package":"https://github.com/dadrus/heimdall","purl":null,"source":"GHSA-38x9-25wx-7fg2"},{"ecosystem":"Go","fixed":["0.17.17"],"introduced":["0"],"last_affected":[],"package":"https://github.com/dadrus/heimdall","purl":"pkg:golang/https:/github.com/dadrus/heimdall","source":"GHSA-38x9-25wx-7fg2"}],"prev":{"headline":"Heimdall: Forwarded Header Injection via Unsanitized Host Header in Proxy Mode","id":"CVE-2026-57209"},"products":["heimdall"],"published":"2026-10-23","related":[],"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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"2026-10-29","vendors":["dadrus"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-57210/"}