{"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-2026-106492 in the wild and no public exploit code.","fix":"Upgrade @backstage/backend-defaults to 0.17.8 or later.","what":"CVE-2026-106492 is a high-severity vulnerability in Linuxfoundation Backstage, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-106492 and fix it if it is affected.\n\nWhat it is: CVE-2026-106492 is a high-severity vulnerability in Linuxfoundation Backstage, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-106492 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-2026-106492/ (Markdown: https://insights.sbomify.com/CVE-2026-106492/index.md)","id":"CVE-2026-106492","markdown":"https://insights.sbomify.com/CVE-2026-106492/index.md","name":"CVE-2026-106492","record":{"aliases":["GHSA-cq7v-rfgc-5c7v"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["privilege_escalation","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Backstage developer portal","requires_auth":"low_privilege","summary":"Attackers can bypass service credential access restrictions in Backstage to perform unauthorized write operations via plugin delegation paths.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"backstage","vendor":"linuxfoundation"},{"product":"backstage\\/backend-defaults","vendor":"linuxfoundation"}],"cvss":{"score":7.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-269","name":"Improper Privilege Management"}],"description":"Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 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 preservation of access restrictions during service credential delegation","id":"CVE-2026-106492","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"linuxfoundation:backstage","products":["linuxfoundation:backstage"],"type":"privilege_escalation","year":"2026"},"n_packages":2,"n_references":5,"next":{"headline":"Backstage: Cloud storage catalog locations may cross configured storage boundaries","id":"CVE-2026-106493"},"packages":[{"ecosystem":"npm","fixed":["0.17.8"],"introduced":["0"],"last_affected":[],"package":"@backstage/backend-defaults","purl":null,"source":"GHSA-cq7v-rfgc-5c7v"},{"ecosystem":"npm","fixed":["0.17.8"],"introduced":["0"],"last_affected":[],"package":"@backstage/backend-defaults","purl":"pkg:npm/%40backstage/backend-defaults","source":"GHSA-cq7v-rfgc-5c7v"}],"prev":{"headline":"Backstage: Improper input validation in proxy-backend","id":"CVE-2026-106491"},"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":"2026-10-09","vendors":["@backstage","backstage"]},"summary":"Attackers can bypass service credential access restrictions in Backstage to perform unauthorized write operations via plugin delegation paths.","url":"https://insights.sbomify.com/CVE-2026-106492/"}