CVE-2026-78228

Summary

Uncontrolled Recursion vulnerability in ash-project ash_oban allows a user who can drive a trigger's on_error action to fail on the final attempt to exhaust worker CPU and memory, denying service.

The generated worker's atomic handle_error/4 runs the trigger's on_error action on a job's final attempt inside a rescue that, when the action itself raises, calls handle_error/4 again with the same job. The job's attempt still equals max_attempts, so it re-enters the same clause and re-runs the failing action, with no exit. Any deterministic on_error failure (a data-layer outage, a misconfigured action, or a record the action rejects) loops forever; because the recursive call is not in tail position, each iteration retains a formatted stacktrace and the process heap grows without bound while the failing statement is re-issued against the data layer until the runtime kills the worker.

This issue affects ash_oban: from 0.8.0-rc.1 before 0.8.14.

Affected Software

Weaknesses

• CWE-674: CWE-674 Uncontrolled Recursion

References

• https://github.com/ash-project/ash_oban/security/advisories/GHSA-94p7-498r-mrhp
• https://cna.erlef.org/cves/CVE-2026-78228.html
• https://osv.dev/vulnerability/EEF-CVE-2026-78228
• https://github.com/ash-project/ash_oban/commit/851cd0e76ed882bf736fc48d10f96d037e26b5f0

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