{"answers":{"affected":"3 open source packages ship an affected version, including github.com/dadrus/heimdall.","exploited":"There is no known exploitation of CVE-2026-42274 in the wild and no public exploit code.","fix":"Upgrade github.com/dadrus/heimdall to 0.17.14 or later.","what":"CVE-2026-42274 is a high-severity authentication bypass vulnerability in dadrus heimdall, published on 8 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-42274 and fix it if it is affected.\n\nWhat it is: CVE-2026-42274 is a high-severity authentication bypass vulnerability in dadrus heimdall, published on 8 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-42274 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/dadrus/heimdall (Go): affected all versions; fixed in 0.17.14\n- github.com/dadrus/heimdall (Go): affected all versions; fixed in 0.17.14\n- github.com/dadrus/heimdall (Go): affected all versions; fixed in 0.17.14\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-2026-42274/ (Markdown: https://insights.sbomify.com/CVE-2026-42274/index.md)","id":"CVE-2026-42274","markdown":"https://insights.sbomify.com/CVE-2026-42274/index.md","name":"CVE-2026-42274","record":{"aliases":["GHSA-3q34-rx83-r6mq","GO-2026-5097"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Identity Aware Proxy","requires_auth":"none","summary":"Attackers can bypass authorization checks by exploiting path normalization mismatches between the proxy and downstream services, gaining unauthorized access to protected resources.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-436","name":"Interpretation Conflict"},{"id":"CWE-35","name":"Path Traversal: '.../...//'"}],"description":"Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs rule matching on the raw (non-normalized) request path, while downstream components may normalize dot-segments according to RFC 3986, Section 6.2.2.3. This discrepancy can result in heimdall authorizing a request for one path (e.g., /user/../admin, or URL-encoded variants such as /user/%2e%2e/admin or /user/%2e%2e%2fadmin. The latter would require the allow_encoded_slashes option to be set to on or no_decode.) while the downstream ultimately processes a different, normalized path (/admin). This issue has been patched in version 0.17.14.","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: Authorization bypass via path normalization mismatch","id":"CVE-2026-42274","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"zrok: WebDAV drive backend follows symlinks outside DriveRoot, enabling host filesystem read/write","id":"CVE-2026-42275"},"packages":[{"ecosystem":"Go","fixed":["0.17.14"],"introduced":["0"],"last_affected":[],"package":"github.com/dadrus/heimdall","purl":null,"source":"GHSA-3q34-rx83-r6mq"},{"ecosystem":"Go","fixed":["0.17.14"],"introduced":["0"],"last_affected":[],"package":"github.com/dadrus/heimdall","purl":"pkg:golang/github.com/dadrus/heimdall","source":"GHSA-3q34-rx83-r6mq"},{"ecosystem":"Go","fixed":["0.17.14"],"introduced":["0"],"last_affected":[],"package":"github.com/dadrus/heimdall","purl":"pkg:golang/github.com/dadrus/heimdall","source":"GO-2026-5097"}],"prev":{"headline":"Heimdall: Case-sensitive host matching may lead to policy bypass","id":"CVE-2026-42273"},"products":["heimdall"],"published":"2026-05-08","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":"2026-05-11","vendors":["dadrus"]},"summary":"Attackers can bypass authorization checks by exploiting path normalization mismatches between the proxy and downstream services, gaining unauthorized access to protected resources.","url":"https://insights.sbomify.com/CVE-2026-42274/"}