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CVE-2026-82427— Apache Storm Nimbus: Path Traversal as the Supervisor User via Unsanitised Blobstore Map Local Name

Quick assessment

Affected
Apache Software Foundation Apache Storm Nimbus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

漏洞描述 在拓扑配置中的 允许提交者为每个由 Supervisor 本地化的 Blob 指定一个本地名称。该名称在未进行路径规范化的情况下，被用于在拓扑工作目录下构建路径，涉及 和 两处代码。同时，符号链接辅助函数在创建链接前会强制删除目标位置已存在的任何内容。 因此，提交者可以利用 路径段将该“删除并创建符号链接”的操作指向任意路径，并以 Supervisor 用户身份在所有调度了该拓扑的节点上执行。其后果包括：递归删除 Supervisor 拥有的文件内容，以及植入一个符号链接，导致后续 Worker 启动时以

AI Predicted 8.3 Difficulty: Moderate
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I. Basic Information for CVE-2026-82427

Vulnerability Information
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Vulnerability Title
Apache Storm Nimbus: Path Traversal as the Supervisor User via Unsanitised Blobstore Map Local Name
Source: CVE Program / CVE List V5
Vulnerability Description
Description A topology's `topology.blobstore.map` lets the submitter choose a local name for each blob that the supervisor localises. That name was used to build a path under the topology's working directory without normalisation, in both `AsyncLocalizer` and `Container.createBlobstoreLinks`, and the symlink helper force-deletes whatever already exists at the target before creating the link. A submitter could therefore use `../` segments to direct that delete-and-symlink operation at an arbitrary path, as the supervisor user, on every node the topology is scheduled onto. The consequences include recursive deletion of supervisor-owned content and planting a symlink that causes a subsequent worker launch to execute attacker-chosen code as another tenant's operating-system user, which defeats the isolation that `supervisor.run.worker.as.user` is intended to provide. Mitigation Upgrade to 3.1.0, where the resolved target must lie inside the expected root at both call sites. Users who cannot upgrade immediately should restrict topology submission to trusted principals, and may reject submissions whose `topology.blobstore.map` entries contain path separators or `..` segments before they reach Nimbus. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Storm Nimbus 3.0.0 ~ 3.1.0 -

II. Public POCs for CVE-2026-82427

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III. Intelligence Information for CVE-2026-82427

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Mailing List Discussions for CVE-2026-82427 (1)

Same Patch Batch · Apache Software Foundation · 2026-09-14 · 39 CVEs total

CVE-2026-82434 10.0 CRITICAL Apache Storm Nimbus, Apache Storm Client: Disclosure of the Topology ZooKeeper Credential
CVE-2026-78330 Apache Syncope: Privilege escalation for admin user via JWT authentication
CVE-2026-73579 Apache Syncope: Non-recursive Any search could skip Realms restrictions
CVE-2026-75015 Apache Syncope: Nested secrets leak cleartext into audit records readable
CVE-2026-75030 Apache Syncope: Incomplete authorization checks for Group members deprovisioning
CVE-2026-77051 Apache Syncope: SQL injection via unsanitized entityKey and opEvent in Audit Events search
CVE-2026-73668 Apache Syncope: Cross-realm disclosure of confidential ConnId bundles configuration values
CVE-2026-77147 Apache Syncope: Groovy Sandbox escape for empty CommandArgs
CVE-2026-77181 Apache Syncope: ClientApp update entitlement not effective
CVE-2026-77883 Apache Syncope: Information disclosure via one-hop JEXL navigation past the JexlContextBui
CVE-2026-78318 Apache Syncope: Unauthenticated reflected XSS in Console and Enduser
CVE-2026-73470 Apache Syncope: Delegating users can grant unowned Roles
CVE-2026-78336 Apache Syncope: OIDCC4UI provider list discloses client secrets to any authenticated user
CVE-2026-82232 Apache Syncope: SQL injection via sort parameter in Task search
CVE-2026-86460 Apache Syncope: Cypher Injection via FIQL Search on Neo4j Persistence
CVE-2026-87779 Apache Syncope: AES Secret Key disclosure via log output
CVE-2026-87785 Apache Syncope: JWT subject spoofing
CVE-2026-87802 Apache Syncope: SRA OAuth2 JWT signature verification bypass
CVE-2026-68570 Apache Doris: Authorization bypass leading to unauthorized data access
CVE-2026-72524 Apache Doris: Authorization bypass allowing a low-privilege user to read/write/drop arbitr

Showing top 20 of 39 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Apache Storm Nimbus
Same vendor: Apache Software Foundation
Same weakness: CWE-22

V. Comments for CVE-2026-82427

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