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CVE-2023-22467

luxon.js inefficient regular expression complexity vulnerability

7.5 HighFix available

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 Moment as CVE-2022-31129. Versions 1.38.1, 2.5.2, and 3.2.1 contain patches for this issue. As a workaround, limit the length of the input.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.85%Up 0.8 points since Jan 5, 2023
90%50%10%1%

What each source reports

CVE List Score used 7.5

luxon.js inefficient regular expression complexity vulnerability

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 Moment as CVE-2022-31129. Versions 1.38.1, 2.5.2, and 3.2.1 contain patches for this issue. As a workaround, limit the length of the input.

Record
CVE-2023-22467
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1333
Updated
2026-11-02
EUVDEUVD-2023-0326 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 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 Moment as CVE-2022-31129. Versions 1.38.1, 2.5.2, and 3.2.1 contain patches for this issue. As a workaround, limit the length of the input.

Record
EUVD-2023-0326
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-3xq5-wjfh-ppjc 7.5

Luxon Inefficient Regular Expression Complexity vulnerability

Impact

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 is the same bug as Moment's https://github.com/moment/moment/security/advisories/GHSA-wc69-rhjr-hc9g

Workarounds

Limit the length of the input.

References

There is an excellent writeup of the same issue in Moment: https://github.com/moment/moment/pull/6015#issuecomment-1152961973

Details

DateTime.fromRFC2822("(".repeat(500000)) takes a couple minutes to complete.

Record
GHSA-3xq5-wjfh-ppjc
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1333
Updated
2026-11-02
NVD 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 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 Moment as CVE-2022-31129. Versions 1.38.1, 2.5.2, and 3.2.1 contain patches for this issue. As a workaround, limit the length of the input.

Record
CVE-2023-22467
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1333
Updated
2026-11-02
OSV 7.5

luxon.js inefficient regular expression complexity vulnerability

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 Moment as CVE-2022-31129. Versions 1.38.1, 2.5.2, and 3.2.1 contain patches for this issue. As a workaround, limit the length of the input.

Record
CVE-2023-22467
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1333
Updated
2026-11-02
OSVGHSA-3xq5-wjfh-ppjc 7.5

Luxon Inefficient Regular Expression Complexity vulnerability

Impact

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 is the same bug as Moment's https://github.com/moment/moment/security/advisories/GHSA-wc69-rhjr-hc9g

Workarounds

Limit the length of the input.

References

There is an excellent writeup of the same issue in Moment: https://github.com/moment/moment/pull/6015#issuecomment-1152961973

Details

DateTime.fromRFC2822("(".repeat(500000)) takes a couple minutes to complete.

Record
GHSA-3xq5-wjfh-ppjc
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1333
Updated
2026-11-02
OSVCLSA-2026-1783731811 No score

TuxCare security update for luxon (1 CVE)

TuxCare rebuilt luxon to address 1 CVE. Fixed in 2.3.0-tuxcare.1.

Record
CLSA-2026-1783731811
Updated
2026-11-02
OSVCLSA-2026-1786539981 No score

TuxCare security update for dompurify (10 CVEs)

TuxCare rebuilt dompurify to address 10 CVEs. Fixed in 2.3.0-tuxcare.1.

Record
CLSA-2026-1786539981
Updated
2026-11-02
OSVROOT-APP-NPM-CVE-2023-22467 No score

CVE-2023-22467 in @rootio/validator - Patched by Root

Root has patched CVE-2023-22467 in the @rootio/validator package for Root:npm. Multiple fixed versions available.

Record
ROOT-APP-NPM-CVE-2023-22467
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
luxon
npm
 2.0.0 up to 2.5.2
2.5.2
luxon
npm
 3.0.0 up to 3.2.1
3.2.1
luxon
npm
 1.0.0 up to 1.28.1
1.28.1
luxon
TuxCare:npm
 2.3.0-tuxcare.0 up to 2.3.0-tuxcare.1, plus listed versions
2.3.0
2.3.0-tuxcare.1
@rootio/validator
Root:npm
 before 7.2.0-root.io.1
7.2.0-root.io.1
@rootio/luxon
Root:npm
 before 1.28.0-root.io.1
1.28.0-root.io.11.28.0-root.io.2
luxon
Root:npm
 before 1.28.0-aikido.2
1.28.0-aikido.2

History

History
RecordedChangedSources
facts
affected
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-22467 is a high vulnerability (CVSS 7.5) in Moment Luxon, published January 4, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.85%, the 79th percentile. Fixed in luxon 2.5.2.

References

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