# Angular SSR: Path Traversal to Sibling Directories in CommonEngine on Windows

Advisory record · `GHSA-7g7c-h8rr-7p6q`

- **Identifiers:** `GHSA-7g7c-h8rr-7p6q` · `CVE-2026-104871`
- **State:** Confirmed
- **Severity:** CVSS 6.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-22](https://cwe.mitre.org/data/definitions/22.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md)
- **Published:** 5 Oct 2026
- **Updated:** 5 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 5 Oct 2026, 22:53 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@angular/ssr` (npm): affected `>=22.0.0, <22.1.7 || >=21.0.0, <21.2.23 || >=20.0.0, <20.3.36 || <=19.2.27`; fixed in `22.1.7`, `21.2.23`, `20.3.36`

## 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:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0042, the 36th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 13:34 UTC: First seen by agentprime
- 31 Oct 2026, 13:34 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7g7c-h8rr-7p6q)

## Sources

- [GitHub Advisory Database: GHSA-7g7c-h8rr-7p6q](https://github.com/advisories/GHSA-7g7c-h8rr-7p6q)
- [OSV: GHSA-7g7c-h8rr-7p6q](https://osv.dev/vulnerability/GHSA-7g7c-h8rr-7p6q)
- <https://github.com/angular/angular-cli/security/advisories/GHSA-7g7c-h8rr-7p6q>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-104871>
- <https://github.com/angular/angular-cli/commit/645e41a47d21b7651837a4250de99af0509626e2>
- <https://github.com/angular/angular-cli/commit/70748ca8e76fe4b42798719410336119d943e755>
- <https://github.com/angular/angular-cli/commit/bb72145f9ab45aee29f523236b3a25cd0813a841>
- <https://github.com/angular/angular-cli/commit/c3e5982e49705f0f6a913cb94622b4c555d2d914>
- <https://github.com/angular/angular-cli>
- <https://github.com/angular/angular-cli/releases/tag/v20.3.36>
- <https://github.com/angular/angular-cli/releases/tag/v21.2.23>
- <https://github.com/angular/angular-cli/releases/tag/v22.1.7>

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-7g7c-h8rr-7p6q>, 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-7g7c-h8rr-7p6q/>. Everything for agents: <https://agentprime.io/llms.txt>.