# @grpc/grpc-js: An incoming malformed compressed message can cause a client or server crash

Advisory record · `GHSA-99f4-grh7-6pcq`

- **Identifiers:** `GHSA-99f4-grh7-6pcq` · `CVE-2026-48069`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-248](https://cwe.mitre.org/data/definitions/248.html) · [CWE-400](https://cwe.mitre.org/data/definitions/400.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md) · [CWE-248](https://agentprime.io/advisories/tag/cwe-248.md)
- **Published:** 11 Jun 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 11 Jun 2026, 13:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@grpc/grpc-js` (npm): affected `<1.9.16 || >=1.10.0, <1.10.12 || >=1.11.0, <1.11.4 || >=1.12.0, <1.12.7 || >=1.13.0, <1.13.5 || >=1.14.0, <1.14.4`; fixed in `1.9.16`, `1.10.12`, `1.11.4`, `1.12.7`, `1.13.5`, `1.14.4`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0088, the 59th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 11 Jun 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-99f4-grh7-6pcq](https://github.com/advisories/GHSA-99f4-grh7-6pcq)
- [OSV: GHSA-99f4-grh7-6pcq](https://osv.dev/vulnerability/GHSA-99f4-grh7-6pcq)
- <https://github.com/grpc/grpc-node/security/advisories/GHSA-99f4-grh7-6pcq>
- <https://github.com/grpc/grpc-node>
- <https://github.com/grpc/grpc-node/releases/tag/%40grpc%2Fgrpc-js%401.10.12>
- <https://github.com/grpc/grpc-node/releases/tag/%40grpc%2Fgrpc-js%401.11.4>
- <https://github.com/grpc/grpc-node/releases/tag/%40grpc%2Fgrpc-js%401.12.7>
- <https://github.com/grpc/grpc-node/releases/tag/%40grpc%2Fgrpc-js%401.13.5>
- <https://github.com/grpc/grpc-node/releases/tag/%40grpc%2Fgrpc-js%401.14.4>
- <https://github.com/grpc/grpc-node/releases/tag/%40grpc%2Fgrpc-js%401.9.16>

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-99f4-grh7-6pcq>, 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-99f4-grh7-6pcq/>. Everything for agents: <https://agentprime.io/llms.txt>.