# Angular: Sanitization bypass via directive host bindings on concrete host elements in @angular/core and @angular/compiler

Advisory record · `GHSA-hh8m-fm6v-7cvg`

- **Identifiers:** `GHSA-hh8m-fm6v-7cvg` · `CVE-2026-88057`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md)
- **Published:** 10 Sept 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 10 Sept 2026, 20:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@angular/core` (npm): affected `>=22.0.0, <22.1.0 || >=21.0.0, <21.2.20 || >=20.0.0, <20.3.28 || <=19.2.25`; fixed in `22.1.0`, `21.2.20`, `20.3.28`
- `@angular/compiler` (npm): affected `>=22.0.0, <22.1.0 || >=21.0.0, <21.2.20 || >=20.0.0, <20.3.28 || <=19.2.25`; fixed in `22.1.0`, `21.2.20`, `20.3.28`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0037, the 31st percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 18 Aug 2026, 09:12 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/angular/angular/security/advisories/GHSA-hh8m-fm6v-7cvg)

## Sources

- [GitHub Advisory Database: GHSA-hh8m-fm6v-7cvg](https://github.com/advisories/GHSA-hh8m-fm6v-7cvg)
- [OSV: GHSA-hh8m-fm6v-7cvg](https://osv.dev/vulnerability/GHSA-hh8m-fm6v-7cvg)
- <https://github.com/angular/angular/security/advisories/GHSA-hh8m-fm6v-7cvg>
- <https://github.com/angular/angular/issues/69550>
- <https://github.com/angular/angular/pull/69558>
- <https://github.com/angular/angular/commit/2f96c8020f85ccb715a76de4b79a0c680c2c7264>
- <https://github.com/angular/angular/commit/6afe6fa781c2f0931f0aedd729b9884a8fe212ee>
- <https://github.com/angular/angular/commit/6caa298dee58319b2d674dc91364e26ffe3ecb2b>
- <https://github.com/angular/angular>
- <https://github.com/angular/angular/releases/tag/v20.3.28>
- <https://github.com/angular/angular/releases/tag/v21.2.20>
- <https://github.com/angular/angular/releases/tag/v22.1.0>

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-hh8m-fm6v-7cvg>, 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-hh8m-fm6v-7cvg/>. Everything for agents: <https://agentprime.io/llms.txt>.