# Kredis JSON Possible Deserialization of Untrusted Data Vulnerability

Advisory record · `GHSA-h2wm-p2vg-6pw4`

- **Identifiers:** `GHSA-h2wm-p2vg-6pw4` · `CVE-2023-27531`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-502](https://cwe.mitre.org/data/definitions/502.html)
- **Tags:** [Insecure deserialization](https://agentprime.io/advisories/tag/deserialization.md)
- **Published:** 9 Jun 2023
- **Updated:** 10 Jan 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 9 Jun 2023, 22:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `kredis` (RubyGems): affected `<1.3.0.1`; fixed in `1.3.0.1`

## 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 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.0054, the 45th 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 9 Jun 2023. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-h2wm-p2vg-6pw4](https://github.com/advisories/GHSA-h2wm-p2vg-6pw4)
- [OSV: GHSA-h2wm-p2vg-6pw4](https://osv.dev/vulnerability/GHSA-h2wm-p2vg-6pw4)
- <https://nvd.nist.gov/vuln/detail/CVE-2023-27531>
- <https://github.com/rails/kredis/commit/d576b7ae5c8d3d74eeb4bd84cad0aa64ffc299fa>
- <https://discuss.rubyonrails.org/t/cve-2023-27531-possible-deserialization-of-untrusted-data-vulnerability-in-kredis-json/82467>
- <https://discuss.rubyonrails.org/t/cve-2023-27531-possible-deserialization-of-untrusted-data-vulnerability-in-kredis-json/82467#post_1>
- <https://github.com/rails/kredis>
- <https://github.com/rails/kredis/releases/tag/v1.3.0.1>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/kredis/CVE-2023-27531.yml>

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-h2wm-p2vg-6pw4>, 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-h2wm-p2vg-6pw4/>. Everything for agents: <https://agentprime.io/llms.txt>.