CVE-2021-41117: keypair is a a RSA PEM key generator written in javascript

Q: How do I fix CVE-2021-41117?

keypair: upgrade to 1.0.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-41117 being exploited?

CVE-2021-41117 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-2021-41117 affect?

CVE-2021-41117 affects keypair. Severity is high (CVSS 8.7). keypair is a a RSA PEM key generator written in javascript. keypair implements a lot of cryptographic primitives on its own or by borrowing from other libraries where possible, including node-forge. An issue was discovered where this librar

Q: How urgent is CVE-2021-41117?

Priority 62/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.7REMOTEUPGRADE

CVE-2021-41117 is a high-severity flaw (CVSS 8.7) affecting keypair. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

keypair is a a RSA PEM key generator written in javascript. keypair implements a lot of cryptographic primitives on its own or by borrowing from other libraries where possible, including node-forge. An issue was discovered where this library was generating identical RSA keys used in SSH. This would mean that the library is generating identical P, Q (and thus N) values which, in practical terms, is impossible with RSA-2048 keys. Generating identic

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-335
Published	2021-10-11
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: keypair project

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

Am I affected?

Timeline

2021-10-11 17:15 UTCPublished CVE record published
2026-06-17 04:07 UTCUpdated Record last modified

keypair project keypair UPGRADE

Affected: < 1.0.4

Fixed in: 1.0.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy keypair || rpm -q keypair || keypair --version

2. UPGRADE to 1.0.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade keypair

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade keypair

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-2021-41117?

keypair: upgrade to 1.0.4. Exact commands for each OS are on this page.

Is CVE-2021-41117 being exploited?

CVE-2021-41117 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-2021-41117 affect?

CVE-2021-41117 affects keypair. Severity is high (CVSS 8.7). keypair is a a RSA PEM key generator written in javascript. keypair implements a lot of cryptographic primitives on its own or by borrowing from other libraries where possible, including node-forge. An issue was discovered where this librar

How urgent is CVE-2021-41117?

Priority 62/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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