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RubyGems HTTPS to HTTP redirect

CVE-2012-2125GHSA-228f-g3h7-3fj3

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (rubygems-update 1.8.23), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
  • CVE-2012-2125: 2.47% estimated exploitation activity in the next 30 days; percentile 84.51 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

RubyGems before 1.8.23 can redirect HTTPS connections to HTTP, which makes it easier for remote attackers to observe or modify a gem during installation via a man-in-the-middle attack.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-228f-g3h7-3fj3

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2012-2125

Advisory: RubyGems HTTPS to HTTP redirect
IDs: CVE-2012-2125, GHSA-228f-g3h7-3fj3
Record: https://patchnext.com/advisories/cve-2012-2125 (revision 1, source checked 26 Oct 2026, 15:47 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: rubygems-update 1.8.23. A vendor fix does not mean a deployment is fixed.

## Affected components
- RubyGems rubygems-update: affected < 1.8.23; fixed in 1.8.23

## Suggested inspection (read-only)
- RubyGems rubygems-update: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on rubygems-update.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-228f-g3h7-3fj3 (GitHub-reviewed advisory GHSA-228f-g3h7-3fj3 lists affected ranges: RubyGems rubygems-update >=0 <1.8.23)

Commands are suggestions: review each one before running it.

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