Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-82432— Apache Storm Nimbus: Blobstore Authorization Bypass via Rebalance Configuration Overrides

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.

描述 Nimbus 仅在拓扑提交时，针对调用主体（calling subject）对 进行校验。Rebalance 操作虽然接受配置覆盖参数，并从中剥离了一小部分键值，但并未重新执行该校验。因此，拥有 rebalance 权限的调用者可以通过 blobstore map 条目指定一个其 ACL 未授予访问权限的 blob。Supervisors 会将 map 中指定的键值进行本地化（localise），将该 blob 的内容解压并放入拓扑的工作目录中。 同一安全公告还涵盖了 方法：该方法未执行任何授权检查，也未传递

AI Predicted 5.5 Difficulty: Moderate
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-82432

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Apache Storm Nimbus: Blobstore Authorization Bypass via Rebalance Configuration Overrides
Source: CVE Program / CVE List V5
Vulnerability Description
Description Nimbus validated `topology.blobstore.map` against the calling subject at submission time only. The rebalance operation accepts configuration overrides and stripped a small set of keys from them, but never re-ran that validation, so a caller authorised to rebalance a topology could introduce a blobstore map entry naming a blob whose ACL does not grant them access. Supervisors localise whatever key the map names, placing the blob's contents into the topology's working directory. The same advisory covers `listBlobs`, which performed no authorization check and passed no subject, unlike the neighbouring `getBlobMeta` and `beginBlobDownload` operations. It therefore returned every key in the blobstore to any caller able to reach the Nimbus Thrift port, which provides the key names that make the above practical. On its own the disclosure is metadata only. Mitigation Upgrade to 3.1.0, where rebalance configuration overrides are validated exactly as submission-time configuration is, against the rebalancing caller, and where `listBlobs` applies the configured authorization. Users who cannot upgrade immediately should restrict rebalance rights to trusted principals, keeping in mind that membership of a topology's `topology.users` or `topology.groups` confers them. 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
授权机制不正确
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-2026-82432

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-82432

请登录查看更多情报信息。

Mailing List Discussions for CVE-2026-82432 (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-863

V. Comments for CVE-2026-82432

No comments yet

Leave a comment