HIGH 8.9 NVD
CVE-2026-118391
Allocation of Resources Without Limits or Throttling vulnerability in elixir-ecto ecto allows an unauthenticated remote attacker to exhaust memory in the applic
Allocation of Resources Without Limits or Throttling vulnerability in elixir-ecto ecto allows an unauthenticated remote attacker to exhaust memory in the application and in the database server by sending requests with distinct JSON keys or list lengths where the application interpolates them into json_extract_path/2, field[^key] or splice/1. Ecto caches prepared queries per repository in an ETS table with no size limit and no eviction. Interpolated JSON path elements become part of the query expression instead of its parameters, and splice/1 expands into one placeholder per element, so every distinct key or list length creates a new cache entry. With ecto_sql each entry is also a new prepared statement on the database connection that runs it. None of this memory is released until the processes restart.
This issue affects ecto: from 3.4.0 before 3.14.3.
References
- https://cna.erlef.org/cves/CVE-2026-118391.html
- https://ecto.hexdocs.pm/Ecto.Query.API.html#json_extract_path/2
- https://ecto.hexdocs.pm/Ecto.Query.API.html#splice/1
- https://github.com/elixir-ecto/ecto/commit/cb2f03964dac324a9771f84f5088e395326e6de8
- https://github.com/elixir-ecto/ecto/commit/d0e97d8a6e274c81c25fbf08087da8d8b9bae0ea
This high severity vulnerability with a CVSS score of 8.9 was published on 2026-11-04 via NVD.
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