CVE-2023-22467: Luxon is a library for working with dates and times in JavaScript

Q: How do I fix CVE-2023-22467?

luxon: upgrade to 1.28.1, 2.5.2, 3.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-22467 being exploited?

CVE-2023-22467 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-2023-22467 affect?

CVE-2023-22467 affects luxon. Severity is high (CVSS 7.5). Luxon is a library for working with dates and times in JavaScript. On the 1.x branch prior to 1.38.1, the 2.x branch prior to 2.5.2, and the 3.x branch on 3.2.1, Luxon's `DateTime.fromRFC2822() has quadratic (N^2) complexity on some specifi

Q: How urgent is CVE-2023-22467?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2023-22467 is a high-severity flaw (CVSS 7.5) affecting luxon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Luxon is a library for working with dates and times in JavaScript. On the 1.x branch prior to 1.38.1, the 2.x branch prior to 2.5.2, and the 3.x branch on 3.2.1, Luxon's `DateTime.fromRFC2822() has quadratic (N^2) complexity on some specific inputs. This causes a noticeable slowdown for inputs with lengths above 10k characters. Users providing untrusted data to this method are therefore vulnerable to (Re)DoS attacks. This issue also appears in Mo

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-1333
Published	2023-01-04
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2023-01-04 22:15 UTCPublished CVE record published
2026-06-17 05:35 UTCUpdated Record last modified

momentjs luxon UPGRADE

Affected: >= 1.0.0 and < 1.28.1 · >= 2.0.0 and < 2.5.2 · >= 3.0.0 and < 3.2.1

Fixed in: 1.28.1, 2.5.2, 3.2.1

Safe to downgrade to: a release before 1.0.0

1. Check installed version

npm ls luxon

2. UPGRADE to 1.28.1

npm install luxon@">=1.28.1"

3. If no update is available yet, DOWNGRADE to a release before 1.0.0

npm view luxon versions npm install luxon@"<1.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-22467?

luxon: upgrade to 1.28.1, 2.5.2, 3.2.1. Exact commands for each OS are on this page.

Is CVE-2023-22467 being exploited?

CVE-2023-22467 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-2023-22467 affect?

CVE-2023-22467 affects luxon. Severity is high (CVSS 7.5). Luxon is a library for working with dates and times in JavaScript. On the 1.x branch prior to 1.38.1, the 2.x branch prior to 2.5.2, and the 3.x branch on 3.2.1, Luxon's `DateTime.fromRFC2822() has quadratic (N^2) complexity on some specifi

How urgent is CVE-2023-22467?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs