# smol-toml: Denial of Service via malformed TOML documents

Advisory record · `GHSA-7w5x-hrqm-74c2`

- **Identifiers:** `GHSA-7w5x-hrqm-74c2` · `CVE-2026-85730`
- **State:** Confirmed
- **Severity:** CVSS 8.2 High
- **Critical:** No
- **Weakness (CWE):** [CWE-606](https://cwe.mitre.org/data/definitions/606.html) · [CWE-835](https://cwe.mitre.org/data/definitions/835.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md) · [CWE-606](https://agentprime.io/advisories/tag/cwe-606.md)
- **Published:** 9 Sept 2026
- **Updated:** 9 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 9 Sept 2026, 18:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `smol-toml` (npm): affected `<1.7.1`; fixed in `1.7.1`

## 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

- 8.2 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:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0052, the 44th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 9 Sept 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-7w5x-hrqm-74c2](https://github.com/advisories/GHSA-7w5x-hrqm-74c2)
- [OSV: GHSA-7w5x-hrqm-74c2](https://osv.dev/vulnerability/GHSA-7w5x-hrqm-74c2)
- <https://github.com/squirrelchat/smol-toml/security/advisories/GHSA-7w5x-hrqm-74c2>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-85730>
- <https://github.com/squirrelchat/smol-toml/commit/30f5c367d946b695f379b5d4f0946b2f0a0a8c2f>
- <https://github.com/squirrelchat/smol-toml>
- <https://github.com/squirrelchat/smol-toml/releases/tag/v1.7.1>
- <https://medium.com/@ravindu.lakmina1/seven-bytes-that-freeze-a-node-js-server-forever-the-story-of-cve-2026-85730-3213328b38f0>

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-7w5x-hrqm-74c2>, 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-7w5x-hrqm-74c2/>. Everything for agents: <https://agentprime.io/llms.txt>.