# Angular: SSRF via protocol-relative and backslash URLs in Angular Platform-Server

Advisory record · `GHSA-45q2-gjvg-7973`

- **Identifiers:** `GHSA-45q2-gjvg-7973` · `CVE-2026-41423`
- **State:** Confirmed
- **Severity:** CVSS 8.7 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:** 16 Apr 2026
- **Updated:** 12 May 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 16 Apr 2026, 22:36 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-next.0, <22.0.0-next.8 || >=21.0.0-next.0, <21.2.9 || >=20.0.0-next.0, <20.3.19 || >=19.0.0-next.0, <19.2.21 || <=18.2.14`; fixed in `22.0.0-next.8`, `21.2.9`, `20.3.19`, `19.2.21`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0031, the 23rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 16 Apr 2026, 07:12 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/angular/angular/security/advisories/GHSA-45q2-gjvg-7973)
- 8 May 2026, 14:16 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-41423)

## Sources

- [GitHub Advisory Database: GHSA-45q2-gjvg-7973](https://github.com/advisories/GHSA-45q2-gjvg-7973)
- [OSV: GHSA-45q2-gjvg-7973](https://osv.dev/vulnerability/GHSA-45q2-gjvg-7973)
- <https://github.com/angular/angular/security/advisories/GHSA-45q2-gjvg-7973>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-41423>
- <https://github.com/angular/angular/pull/68194>
- <https://github.com/angular/angular/commit/ede7c58a2aa13fdccc8f0b67ce93ba1c11749412>
- <https://github.com/angular/angular>

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-45q2-gjvg-7973>, 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-45q2-gjvg-7973/>. Everything for agents: <https://agentprime.io/llms.txt>.