CVE-2021-22918

Name: CVE-2021-22918
Creator: NVD / NIST
Published: 2021-07-12T11:15:07.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 23.13%

Last modified Jun 17, 2026

CVE-2021-22918 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Node.js before 16.4.1, 14.17.2, 12.22.2 is vulnerable to an out-of-bounds read when uv__idna_toascii() is used to convert strings to ASCII. The pointer p is read and increased without checking whether it is beyond pe, with the latter holding a pointer to the end of the buffer. EPSS estimates a 23.13% chance of exploitation in the next 30 days.

Description

Node.js before 16.4.1, 14.17.2, 12.22.2 is vulnerable to an out-of-bounds read when uv__idna_toascii() is used to convert strings to ASCII. The pointer p is read and increased without checking whether it is beyond pe, with the latter holding a pointer to the end of the buffer. This can lead to information disclosures or crashes. This function can be triggered via uv_getaddrinfo().

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

23.13%

97.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nodejs	Node.Js	>= 12.0.0, < 12.22.2
Nodejs	Node.Js	>= 14.0.0, < 14.17.2
Nodejs	Node.Js	>= 16.0.0, < 16.4.1
Siemens	Sinec Infrastructure Network Services	< 1.0.1.1

References

https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
https://hackerone.com/reports/1209681Exploit, Third Party Advisory
https://nodejs.org/en/blog/vulnerability/july-2021-security-releases/Patch, Vendor Advisory
https://security.gentoo.org/glsa/202401-23
https://security.netapp.com/advisory/ntap-20210805-0003/Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
https://hackerone.com/reports/1209681Exploit, Third Party Advisory
https://nodejs.org/en/blog/vulnerability/july-2021-security-releases/Patch, Vendor Advisory
https://security.gentoo.org/glsa/202401-23
https://security.netapp.com/advisory/ntap-20210805-0003/Third Party Advisory

Timeline

Published: Jul 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22918?

How severe is CVE-2021-22918?

CVE-2021-22918 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 23.13% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22918?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22918?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST