Vulnerability Description
Exposure of Data Element to Wrong Session vulnerability in ash-project ash_graphql can deliver one subscription's resolved records to a different subscriber's topic. AshGraphql.Subscription.Batcher.do_send/5 reads the resolved batch from the process dictionary via Process.get(:batch_resolved) and then unconditionally deletes it. That is sound only inside a task the library owns. On the :backpressure_sync and :noproc fallbacks do_send/5 runs inline in the publishing caller's process, so if a resolver inside an outer do_send/5 triggers another synchronous Ash notification, the inner call finds the outer run's value still under :batch_resolved, adopts it as its own result, and publishes it to the inner topic, a different subscription document with a different actor and tenant. It then deletes the key, so the outer run publishes nothing. The key is not namespaced by run, so records cannot be told apart. The fix saves, clears, and restores :batch_resolved around each run. This issue affects ash_graphql: from 1.4.0 before 1.11.0.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-82367.html
- https://github.com/ash-project/ash_graphql/commit/b798ef5288664a0261990b19765558
- https://github.com/ash-project/ash_graphql/security/advisories/GHSA-wm4m-cjmc-5v
- https://osv.dev/vulnerability/EEF-CVE-2026-82367
- https://github.com/ash-project/ash_graphql/security/advisories/GHSA-wm4m-cjmc-5v
FAQ
What is CVE-2026-82367?
CVE-2026-82367 is a documented vulnerability. Exposure of Data Element to Wrong Session vulnerability in ash-project ash_graphql can deliver one subscription's resolved records to a different subscriber's topic. AshGraphql.Subscription.Batcher.d...
How severe is CVE-2026-82367?
CVSS scoring is not yet available for CVE-2026-82367. Check NVD for updates.
Is there a patch for CVE-2026-82367?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.