Vulnerability Description
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in ash-project ash_oban allows a user whose input reaches the :args option of AshOban.build_trigger/3 to retarget an update or destroy trigger at another record, including across tenants. build_trigger/3 builds the trusted job arguments with atom keys (:primary_key, :tenant, :action_arguments) and merges the caller's :args underneath so the trusted values win on collision. Because Oban job arguments round-trip through JSON, the caller's keys arrive as strings, so Map.merge sees no collision and both keys survive. When the job is persisted the JSON object is de-duplicated keeping the last (string) key, and the worker reads the caller's value. The documentation describes :args as unable to affect the action, so an application that forwards user input into it for uniqueness scoping is exposed to authorization bypass and tenant isolation breaks. This issue affects ash_oban: from 0.2.5 before 0.8.14.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-78038.html
- https://github.com/ash-project/ash_oban/commit/da2d81e1e8e1dcc3e6ec8587cdb4f2735
- https://github.com/ash-project/ash_oban/security/advisories/GHSA-gj9p-x393-rf9h
- https://osv.dev/vulnerability/EEF-CVE-2026-78038
- https://github.com/ash-project/ash_oban/security/advisories/GHSA-gj9p-x393-rf9h
FAQ
What is CVE-2026-78038?
CVE-2026-78038 is a documented vulnerability. Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in ash-project ash_oban allows a user whose input reaches the :args option of AshOban.build_trigger/3 to re...
How severe is CVE-2026-78038?
CVSS scoring is not yet available for CVE-2026-78038. Check NVD for updates.
Is there a patch for CVE-2026-78038?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.