# ntfy.sh allows a remote attacker to execute arbitrary code via the parseActions function

Advisory record · `GHSA-pqhx-w72w-m393`

- **Identifiers:** `GHSA-pqhx-w72w-m393` · `CVE-2026-39087` · `GO-2026-5551`
- **State:** Confirmed
- **Severity:** CVSS 6.4 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-94](https://cwe.mitre.org/data/definitions/94.html) · [CWE-777](https://cwe.mitre.org/data/definitions/777.html)
- **Tags:** [Code injection](https://agentprime.io/advisories/tag/code-injection.md) · [CWE-777](https://agentprime.io/advisories/tag/cwe-777.md)
- **Published:** 23 Apr 2026
- **Updated:** 25 Jun 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 23 Apr 2026, 18:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `heckel.io/ntfy/v2` (Go): affected `<2.22.0`; fixed in `2.22.0`

## 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

- 6.4 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`, from CNA (mitre)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0027, the 19th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:06 UTC: First seen by agentprime
- 31 Oct 2026, 15:06 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-pqhx-w72w-m393)

## Sources

- [GitHub Advisory Database: GHSA-pqhx-w72w-m393](https://github.com/advisories/GHSA-pqhx-w72w-m393)
- [OSV: GHSA-pqhx-w72w-m393](https://osv.dev/vulnerability/GHSA-pqhx-w72w-m393)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-39087>
- <https://gist.github.com/MightyNawaf/5d41d6e8ead16e217f86b016002ecae5>
- <https://github.com/binwiederhier/ntfy>
- <https://github.com/binwiederhier/ntfy/releases/tag/v2.22.0>
- <http://ntfy.com/>
- <http://ntfysh.com/>

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-pqhx-w72w-m393>, 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-pqhx-w72w-m393/>. Everything for agents: <https://agentprime.io/llms.txt>.