# Server-side Request Forgery (SSRF) in hackney

Advisory record · `GHSA-vq52-99r9-h5pw`

- **Identifiers:** `GHSA-vq52-99r9-h5pw` · `CVE-2025-1211`
- **State:** Confirmed
- **Severity:** CVSS 6.3 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:** 11 Feb 2025
- **Updated:** 10 Dec 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 11 Feb 2025, 06:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `hackney` (Hex): affected `<1.21.0`; fixed in `1.21.0`

## 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

- 6.3 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:L/E:P`, from CNA (snyk)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0052, the 44th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:25 UTC: First seen by agentprime
- 31 Oct 2026, 15:25 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-vq52-99r9-h5pw)

## Sources

- [GitHub Advisory Database: GHSA-vq52-99r9-h5pw](https://github.com/advisories/GHSA-vq52-99r9-h5pw)
- [OSV: GHSA-vq52-99r9-h5pw](https://osv.dev/vulnerability/GHSA-vq52-99r9-h5pw)
- <https://nvd.nist.gov/vuln/detail/CVE-2025-1211>
- <https://github.com/benoitc/hackney/commit/9594ce58fabd32cd897fc28fae937694515a3d4a>
- <https://gist.github.com/snoopysecurity/996de09ec0cfd0ebdcfdda8ff515deb1>
- <https://github.com/benoitc/hackney>
- <https://github.com/benoitc/hackney/releases/tag/1.21.0>
- <https://security.snyk.io/vuln/SNYK-HEX-HACKNEY-6516131>
- <https://www.blackhat.com/docs/us-17/thursday/us-17-Tsai-A-New-Era-Of-SSRF-Exploiting-URL-Parser-In-Trending-Programming-Languages.pdf>

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-vq52-99r9-h5pw>, 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-vq52-99r9-h5pw/>. Everything for agents: <https://agentprime.io/llms.txt>.