# Contao: Server-Side Request Forgery (SSRF) via Unvalidated RSS Feed URL in Feed Reader Module

Advisory record · `GHSA-87mg-5grr-rhwh`

- **Identifiers:** `GHSA-87mg-5grr-rhwh` · `CVE-2026-57232` · `PKSA-55tn-sgd6-9twh` · `PKSA-yx24-z15d-x2k7`
- **State:** Confirmed
- **Severity:** CVSS 3.1 Low
- **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:** 24 Sept 2026
- **Updated:** 24 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 24 Sept 2026, 19:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `contao/contao` (Packagist): affected `>=5.3.35, <5.3.48 || >=5.4.0, <5.7.9`; fixed in `5.3.48`, `5.7.9`
- `contao/core-bundle` (Packagist): affected `>=5.3.35, <5.3.48 || >=5.4.0, <5.7.9`; fixed in `5.3.48`, `5.7.9`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0029, the 21st percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 13:54 UTC: First seen by agentprime
- 31 Oct 2026, 13:54 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-87mg-5grr-rhwh)

## Sources

- [GitHub Advisory Database: GHSA-87mg-5grr-rhwh](https://github.com/advisories/GHSA-87mg-5grr-rhwh)
- [OSV: GHSA-87mg-5grr-rhwh](https://osv.dev/vulnerability/GHSA-87mg-5grr-rhwh)
- <https://github.com/contao/contao/security/advisories/GHSA-87mg-5grr-rhwh>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-57232>
- <https://github.com/contao/contao/commit/27f6201809553bee767dcef15535bb8f0f4eac5f>
- <https://github.com/contao/contao/commit/53b939ff2c4718e3a1d7c54ddd8886e9370618e4>
- <https://contao.org/en/security-advisories/server-side-request-forgery-via-unvalidated-rss-feed-urls>
- <https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2026-57232.yaml>
- <https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2026-57232.yaml>
- <https://github.com/contao/contao>
- <https://github.com/contao/contao/releases/tag/5.3.48>
- <https://github.com/contao/contao/releases/tag/5.7.9>

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-87mg-5grr-rhwh>, 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-87mg-5grr-rhwh/>. Everything for agents: <https://agentprime.io/llms.txt>.