{"answers":{"affected":"2 open source packages ship an affected version, including @backstage/backend-defaults. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-106494 in the wild and no public exploit code.","fix":"Upgrade @backstage/backend-defaults to 0.17.8 or later.","what":"CVE-2026-106494 is a medium-severity path traversal vulnerability in Linuxfoundation Backstage, published on 6 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-106494 and fix it if it is affected.\n\nWhat it is: CVE-2026-106494 is a medium-severity path traversal vulnerability in Linuxfoundation Backstage, published on 6 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-106494 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @backstage/backend-defaults (npm): affected all versions; fixed in 0.17.8\n- @backstage/backend-defaults (npm): affected all versions; fixed in 0.17.8\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-2026-106494/ (Markdown: https://insights.sbomify.com/CVE-2026-106494/index.md)","id":"CVE-2026-106494","markdown":"https://insights.sbomify.com/CVE-2026-106494/index.md","name":"CVE-2026-106494","record":{"aliases":["GHSA-7649-wm97-w3j3"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_modify","code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Backstage developer portal","requires_auth":"high_privilege","summary":"An attacker with cloud storage write access can craft object names to overwrite protected files, potentially leading to content injection or code execution.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"backstage","vendor":"linuxfoundation"},{"product":"backstage\\/backend_defaults","vendor":"linuxfoundation"}],"cvss":{"score":4.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-73","name":"External Control of File Name or Path"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.","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":"Backstage: Improper input validation in cloud storage URL readers","id":"CVE-2026-106494","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"linuxfoundation:backstage","products":["linuxfoundation:backstage"],"type":"path_traversal","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Backstage: Improper access control in backend action invocation","id":"CVE-2026-106495"},"packages":[{"ecosystem":"npm","fixed":["0.17.8"],"introduced":["0"],"last_affected":[],"package":"@backstage/backend-defaults","purl":null,"source":"GHSA-7649-wm97-w3j3"},{"ecosystem":"npm","fixed":["0.17.8"],"introduced":["0"],"last_affected":[],"package":"@backstage/backend-defaults","purl":"pkg:npm/%40backstage/backend-defaults","source":"GHSA-7649-wm97-w3j3"}],"prev":{"headline":"Backstage: Cloud storage catalog locations may cross configured storage boundaries","id":"CVE-2026-106493"},"products":["backend-defaults","backstage"],"published":"2026-10-06","related":[{"cvss_score":9.6,"headline":"Backstage: Sensitive information exposure in Scaffolder","id":"CVE-2026-106501","kev_date_added":null,"published":"2026-10-06"},{"cvss_score":8.8,"headline":"Backstage: Improper validation of TechDocs MkDocs configuration","id":"CVE-2026-106558","kev_date_added":null,"published":"2026-10-07"},{"cvss_score":8.8,"headline":"Backstage: Improper input validation in TechDocs MkDocs configuration","id":"CVE-2026-88064","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":8.5,"headline":"Backstage: Improper input validation in Sentry scaffolder actions","id":"CVE-2026-106459","kev_date_added":null,"published":"2026-10-06"},{"cvss_score":8.5,"headline":"Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions","id":"CVE-2026-106486","kev_date_added":null,"published":"2026-10-06"},{"cvss_score":8.5,"headline":"Backstage: Improper task state validation in Scaffolder backend","id":"CVE-2026-106500","kev_date_added":null,"published":"2026-10-06"},{"cvss_score":8.5,"headline":"Path Traversal in @backstage/plugin-scaffolder-backend","id":"CVE-2021-43783","kev_date_added":null,"published":"2021-11-29"}],"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":"2026-10-07","vendors":["@backstage","backstage"]},"summary":"An attacker with cloud storage write access can craft object names to overwrite protected files, potentially leading to content injection or code execution.","url":"https://insights.sbomify.com/CVE-2026-106494/"}