# Unleash: Addon webhook URL is dialed server-side with no internal-address filtering, enabling SSRF to internal services / cloud metadata and exfiltration of configured request headers

Advisory record · `GHSA-5vf6-jrqr-78fj`

- **Identifiers:** `GHSA-5vf6-jrqr-78fj` · `CVE-2026-63004`
- **State:** Confirmed
- **Severity:** CVSS 5.5 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Published:** 21 Aug 2026
- **Updated:** 21 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 21 Aug 2026, 19:14 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `unleash-server` (npm): affected `<7.5.2 || >=7.6.0, <7.6.5 || >=8.0.0, <8.0.2`; fixed in `7.5.2`, `7.6.5`, `8.0.2`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0039, the 33rd percentile, on 11 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 21 Aug 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-5vf6-jrqr-78fj](https://github.com/advisories/GHSA-5vf6-jrqr-78fj)
- [OSV: GHSA-5vf6-jrqr-78fj](https://osv.dev/vulnerability/GHSA-5vf6-jrqr-78fj)
- <https://github.com/Unleash/unleash/security/advisories/GHSA-5vf6-jrqr-78fj>
- <https://github.com/Unleash/unleash/commit/2100db76af3473f13e6fb40096cf17a9c2b741a1>
- <https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1>
- <https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d>
- <https://github.com/Unleash/unleash>
- <https://github.com/Unleash/unleash/releases/tag/v7.5.2>
- <https://github.com/Unleash/unleash/releases/tag/v7.6.5>
- <https://github.com/Unleash/unleash/releases/tag/v8.0.2>

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-5vf6-jrqr-78fj>, 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-5vf6-jrqr-78fj/>. Everything for agents: <https://agentprime.io/llms.txt>.