# Unbounded query cache growth from interpolated JSON paths and splice lists in Ecto

Advisory record · `GHSA-cxjx-vmm2-qr8r`

- **Identifiers:** `GHSA-cxjx-vmm2-qr8r` · `CVE-2026-118391` · `EEF-CVE-2026-118391`
- **State:** Confirmed
- **Severity:** CVSS 8.9 High
- **Critical:** No
- **Weakness (CWE):** [CWE-770](https://cwe.mitre.org/data/definitions/770.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 4 Nov 2026
- **Updated:** 4 Nov 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 4 Nov 2026, 13:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `ecto` (Hex): affected `>=3.4.0, <3.14.3`; fixed in `3.14.3`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.9 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H`, from CNA (EEF)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0049, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 4 Nov 2026, 13:57 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-118391)
- 4 Nov 2026, 14:00 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/EEF-CVE-2026-118391)
- 4 Nov 2026, 14:09 UTC: First seen by agentprime
- 4 Nov 2026, 14:17 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-118391)

## Sources

- [GitHub Advisory Database: GHSA-cxjx-vmm2-qr8r](https://github.com/advisories/GHSA-cxjx-vmm2-qr8r)
- [OSV: GHSA-cxjx-vmm2-qr8r](https://osv.dev/vulnerability/GHSA-cxjx-vmm2-qr8r)
- <https://github.com/elixir-ecto/ecto/security/advisories/GHSA-cxjx-vmm2-qr8r>
- <https://cna.erlef.org/cves/CVE-2026-118391.html>
- <https://github.com/elixir-ecto/ecto/commit/d0e97d8a6e274c81c25fbf08087da8d8b9bae0ea>
- <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/eb03f45b999e2bf67ffae92811233eb6e56dba55>
- <https://github.com/elixir-ecto/ecto/issues/4470>
- <https://github.com/elixir-ecto/ecto/issues/1031>
- <https://github.com/elixir-ecto/ecto/commit/cb2f03964dac324a9771f84f5088e395326e6de8>
- <https://github.com/elixir-ecto/ecto/commit/eef014ad090d27d1a5b69c0e32a50eabd44ab3bb>
- <https://hex.pm/packages/ecto>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-cxjx-vmm2-qr8r>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-cxjx-vmm2-qr8r/>. Everything for agents: <https://agentprime.io/llms.txt>.