CVE-2026-82367

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.

CVSS

No CVSS.

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-82367.html
https://github.com/ash-project/ash_graphql/commit/b798ef5288664a0261990b19765558f168b718fb
https://github.com/ash-project/ash_graphql/security/advisories/GHSA-wm4m-cjmc-5v8c
https://osv.dev/vulnerability/EEF-CVE-2026-82367
https://github.com/ash-project/ash_graphql/security/advisories/GHSA-wm4m-cjmc-5v8c

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-30 19:17

Updated : 2026-09-01 21:15

NVD link : CVE-2026-82367

Mitre link : CVE-2026-82367

CVE.ORG link : CVE-2026-82367

JSON object : View

Products Affected

No product.

CWE

CWE-488

Exposure of Data Element to Wrong Session

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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.\n\nThis issue affects ash_graphql: from 1.4.0 before 1.11.0."}], "lastModified": "2026-09-01T21:15:00.147", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}