{"answers":{"affected":"2 open source packages ship an affected version, including @backstage/plugin-catalog-backend. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-106498 in the wild and no public exploit code.","fix":"Upgrade @backstage/plugin-catalog-backend to 3.9.1 or later.","what":"CVE-2026-106498 is a high-severity server-side request forgery 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-2026-106498 and fix it if it is affected.\n\nWhat it is: CVE-2026-106498 is a high-severity server-side request forgery 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-2026-106498 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @backstage/plugin-catalog-backend (npm): affected all versions; fixed in 3.9.1\n- @backstage/plugin-catalog-backend (npm): affected all versions; fixed in 3.9.1\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-2026-106498/ (Markdown: https://insights.sbomify.com/CVE-2026-106498/index.md)","id":"CVE-2026-106498","markdown":"https://insights.sbomify.com/CVE-2026-106498/index.md","name":"CVE-2026-106498","record":{"aliases":["GHSA-qgvj-qcf8-xq73"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Backstage developer portal","requires_auth":"low_privilege","summary":"Authenticated users can exploit improper URL validation in catalog placeholders to access unauthorized internal resources under specific configurations.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"backstage","vendor":"linuxfoundation"},{"product":"backstage_plugin-catalog-backend","vendor":"linuxfoundation"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"},{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Backstage is an open framework for building developer portals. Prior to 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1, the @backstage/plugin-catalog-backend package is affected by improper url validation in catalog entity placeholder resolution. An authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user. This issue is fixed in versions 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1.","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 URL validation in catalog entity placeholder resolution","id":"CVE-2026-106498","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"linuxfoundation:backstage","products":["linuxfoundation:backstage"],"type":"ssrf","year":"2026"},"n_packages":2,"n_references":11,"next":{"headline":"Backstage: Secret-derived values may be exposed in scaffolder task logs","id":"CVE-2026-106499"},"packages":[{"ecosystem":"npm","fixed":["3.9.1"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-catalog-backend","purl":null,"source":"GHSA-qgvj-qcf8-xq73"},{"ecosystem":"npm","fixed":["3.9.1"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-catalog-backend","purl":"pkg:npm/%40backstage/plugin-catalog-backend","source":"GHSA-qgvj-qcf8-xq73"}],"prev":{"headline":"Backstage: Inconsistent catalog property permission evaluation","id":"CVE-2026-106497"},"products":["backstage","plugin-catalog-backend"],"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":"Authenticated users can exploit improper URL validation in catalog placeholders to access unauthorized internal resources under specific configurations.","url":"https://insights.sbomify.com/CVE-2026-106498/"}