# protobuf-cpp and protobuf-python have potential Denial of Service issue

Advisory record · `GHSA-8gq9-2x98-w8hf`

- **Identifiers:** `GHSA-8gq9-2x98-w8hf` · `CVE-2022-1941` · `PYSEC-2026-899`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-119](https://cwe.mitre.org/data/definitions/119.html) · [CWE-1286](https://cwe.mitre.org/data/definitions/1286.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md) · [CWE-1286](https://agentprime.io/advisories/tag/cwe-1286.md)
- **Published:** 23 Sept 2022
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 23 Sept 2022, 20:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `protobuf` (PyPI): affected `<3.18.3 || >=3.19.0, <3.19.5 || >=3.20.0, <3.20.2 || >=4.0.0, <4.21.6`; fixed in `3.18.3`, `3.19.5`, `3.20.2`, `4.21.6`

## 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 GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.015, the 74th percentile, on 5 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 23 Sept 2022. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-8gq9-2x98-w8hf](https://github.com/advisories/GHSA-8gq9-2x98-w8hf)
- [OSV: GHSA-8gq9-2x98-w8hf](https://osv.dev/vulnerability/GHSA-8gq9-2x98-w8hf)
- <https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-8gq9-2x98-w8hf>
- <https://nvd.nist.gov/vuln/detail/CVE-2022-1941>
- <https://cloud.google.com/support/bulletins#GCP-2022-019>
- <https://github.com/protocolbuffers/protobuf>
- <https://lists.debian.org/debian-lts-announce/2023/04/msg00019.html>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBAUKJQL6O4TIWYBENORSY5P43TVB4M3>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPCGUT3T5L6C3IDWUPSUO22QDCGQKTOP>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CBAUKJQL6O4TIWYBENORSY5P43TVB4M3>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPCGUT3T5L6C3IDWUPSUO22QDCGQKTOP>
- <https://security.netapp.com/advisory/ntap-20240705-0001>
- <http://www.openwall.com/lists/oss-security/2022/09/27/1>

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-8gq9-2x98-w8hf>, 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-8gq9-2x98-w8hf/>. Everything for agents: <https://agentprime.io/llms.txt>.