# Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR

Advisory record · `GHSA-f6mr-pjwc-34m4`

- **Identifiers:** `GHSA-f6mr-pjwc-34m4` · `CVE-2026-88056`
- **State:** Confirmed
- **Severity:** CVSS 8.6 High
- **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:** 10 Sept 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 10 Sept 2026, 20:19 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@angular/platform-server` (npm): affected `>=22.0.0, <22.1.4 || >=21.0.0, <21.2.22 || >=20.0.0, <20.3.30 || <=19.2.25`; fixed in `22.1.4`, `21.2.22`, `20.3.30`

## 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

- 8.6 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0054, the 45th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 27 Aug 2026, 05:45 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4)

## Sources

- [GitHub Advisory Database: GHSA-f6mr-pjwc-34m4](https://github.com/advisories/GHSA-f6mr-pjwc-34m4)
- [OSV: GHSA-f6mr-pjwc-34m4](https://osv.dev/vulnerability/GHSA-f6mr-pjwc-34m4)
- <https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4>
- <https://github.com/angular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034c>
- <https://github.com/angular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132>
- <https://github.com/angular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970>
- <https://github.com/angular/angular/commit/9339a7a2de437ed93f9cc3da7f32d0100412d599>
- <https://github.com/angular/angular>
- <https://github.com/angular/angular/releases/tag/v20.3.30>
- <https://github.com/angular/angular/releases/tag/v21.2.22>
- <https://github.com/angular/angular/releases/tag/v22.1.4>

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-f6mr-pjwc-34m4>, 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-f6mr-pjwc-34m4/>. Everything for agents: <https://agentprime.io/llms.txt>.