{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-82427 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-82427 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-82427 is a high-severity path traversal vulnerability in Apache Storm Nimbus, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-82427 and fix it if it is affected.\n\nWhat it is: CVE-2026-82427 is a high-severity path traversal vulnerability in Apache Storm Nimbus, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-82427 in the wild and no public exploit code.\n\nAffected product: Apache Storm Nimbus. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-82427/ (Markdown: https://insights.sbomify.com/CVE-2026-82427/index.md)","id":"CVE-2026-82427","markdown":"https://insights.sbomify.com/CVE-2026-82427/index.md","name":"CVE-2026-82427","record":{"aliases":["GHSA-mmm4-x298-c649"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Apache Storm Nimbus","requires_auth":"low_privilege","summary":"A submitter can exploit path traversal in blobstore mapping to delete files and plant symlinks, enabling code execution as another user when worker isolation is enabled.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Description\n\nA topology's `topology.blobstore.map` lets the submitter choose a local name for each blob that the\nsupervisor localises. That name was used to build a path under the topology's working directory without\nnormalisation, in both `AsyncLocalizer` and `Container.createBlobstoreLinks`, and the symlink helper\nforce-deletes whatever already exists at the target before creating the link.\n\nA submitter could therefore use `../` segments to direct that delete-and-symlink operation at an arbitrary\npath, as the supervisor user, on every node the topology is scheduled onto. The consequences include\nrecursive deletion of supervisor-owned content and planting a symlink that causes a subsequent worker\nlaunch to execute attacker-chosen code as another tenant's operating-system user, which defeats the\nisolation that `supervisor.run.worker.as.user` is intended to provide.\n\nMitigation\n\nUpgrade to 3.1.0, where the resolved target must lie inside the expected root at both call sites.\n\nUsers who cannot upgrade immediately should restrict topology submission to trusted principals, and may\nreject submissions whose `topology.blobstore.map` entries contain path separators or `..` segments before\nthey reach Nimbus.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Apache Storm Nimbus: Path Traversal as the Supervisor User via Unsanitised Blobstore Map Local Name","id":"CVE-2026-82427","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Apache Storm Client: Cross-Tenant Dependency Jar Substitution via Predictable Blob Keys","id":"CVE-2026-82428"},"packages":[],"prev":{"headline":"Apache Storm Nimbus: Arbitrary File Read on Nimbus via Unvalidated Uploaded Jar Location","id":"CVE-2026-82426"},"products":["Apache Storm Nimbus"],"published":"2026-09-14","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"total"},"state":"PUBLISHED","updated":"2026-09-14","vendors":["Apache Software Foundation"]},"summary":"A submitter can exploit path traversal in blobstore mapping to delete files and plant symlinks, enabling code execution as another user when worker isolation is enabled.","url":"https://insights.sbomify.com/CVE-2026-82427/"}