# CVE-2026-82434: Description When ZooKeeper authentication is configured, Storm deliberately retains `storm.zookeeper.topology.auth.payload` in the topology - **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`) - **Exploited in the wild:** Not known - **Fix available:** No - **Published:** 14 Sep 2026 - **Updated:** 14 Sep 2026 - **Also known as:** GHSA-6fmw-8rj9-p9pg ## What is CVE-2026-82434? CVE-2026-82434 is a critical vulnerability in Apache Storm Client, published on 14 Sep 2026. ### Official description Description When ZooKeeper authentication is configured, Storm deliberately retains `storm.zookeeper.topology.auth.payload` in the topology configuration, because workers need it. Nimbus then served that configuration verbatim to any caller holding read-only topology permissions, so a user whose only grant was the ability to view a topology received its ZooKeeper credential. That credential is not read-only. The cluster state implementation uses write-capable ACLs for worker heartbeats, backpressure and error state, so a recipient can forge or remove that state for the topology concerned. It is not a write credential on assignments. The same advisory covers the submission client, which logged the generated payload at INFO on every submission that generated one, and the SASL handlers, which logged it at DEBUG. The credential therefore also reached any log aggregation or support bundle collected from the cluster. Mitigation Upgrade to 3.1.0, where the payload is removed from the configuration served to read-only callers and is no longer written to logs. Users who cannot upgrade immediately should rotate `storm.zookeeper.topology.auth.payload` for existing topologies, review retained logs and support bundles for the value, and restrict read-only topology permissions to trusted principals. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm. Weakness: CWE-532 (Insertion of Sensitive Information into Log File), CWE-522 (Insufficiently Protected Credentials) ## Which versions are affected by CVE-2026-82434? ## How do I fix CVE-2026-82434? No fix has been published for CVE-2026-82434 yet. Limit exposure of the affected software until one is available. ## Is CVE-2026-82434 being exploited? There is no known exploitation of CVE-2026-82434 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-82434 and fix it if it is affected. What it is: CVE-2026-82434 is a critical vulnerability in Apache Storm Client, published on 14 Sep 2026. Exploitation: There is no known exploitation of CVE-2026-82434 in the wild and no public exploit code. Affected product: Apache Storm Client. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. 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. 2. 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. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-82434/ (Markdown: https://insights.sbomify.com/CVE-2026-82434/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82434 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82434 - OSV: https://osv.dev/vulnerability/CVE-2026-82434 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-82434/ Summaries are generated and may contain mistakes; the official description above is the record.