CVE-2024-21654: Rubygems.org is the Ruby community's gem hosting service

Q: How do I fix CVE-2024-21654?

rubygems.org: upgrade to 2024-01-08. Exact commands for each OS are on this page.

Q: Is CVE-2024-21654 being exploited?

CVE-2024-21654 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-21654 affect?

CVE-2024-21654 affects rubygems.org. Severity is medium (CVSS 4.8). Rubygems.org is the Ruby community's gem hosting service. Rubygems.org users with MFA enabled would normally be protected from account takeover in the case of email account takeover. However, a workaround on the forgotten password form allo

Q: How urgent is CVE-2024-21654?

Priority 32/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 4.8REMOTEUPGRADE

CVE-2024-21654 is a medium-severity flaw (CVSS 4.8) affecting rubygems.org. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Rubygems.org is the Ruby community's gem hosting service. Rubygems.org users with MFA enabled would normally be protected from account takeover in the case of email account takeover. However, a workaround on the forgotten password form allows an attacker to bypass the MFA requirement and takeover the account. This vulnerability has been patched in commit 0b3272a.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-287, CWE-306
Published	2024-01-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: rubygems

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-01-12 21:15 UTCPublished CVE record published
2026-06-17 07:09 UTCUpdated Record last modified

rubygems rubygems.org UPGRADE

Affected: < 2024-01-08

Fixed in: 2024-01-08

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy rubygems.org || rpm -q rubygems.org || rubygems.org --version

2. UPGRADE to 2024-01-08 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rubygems.org

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rubygems.org

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-21654?

rubygems.org: upgrade to 2024-01-08. Exact commands for each OS are on this page.

Is CVE-2024-21654 being exploited?

CVE-2024-21654 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-21654 affect?

CVE-2024-21654 affects rubygems.org. Severity is medium (CVSS 4.8). Rubygems.org is the Ruby community's gem hosting service. Rubygems.org users with MFA enabled would normally be protected from account takeover in the case of email account takeover. However, a workaround on the forgotten password form allo

How urgent is CVE-2024-21654?

Priority 32/100. Remotely exploitable, no login, no user action

Software pages

Ruby vulnerabilities

Related CVEs

CVE-2023-40165 HIGH 7.4 UPGRADE rubygems.org is the Ruby community's primary gem (library) hosting service

References

← Back to latest CVEs