CVE-2021-29418

mediumpriority · track · 22EPSS 0.015 · 74 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.51% (74th) EPSS

CVSS 5 · medium

Is it mine?

10 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

The netmask package before 2.0.1 for Node.js mishandles certain unexpected characters in an IP address string, such as an octal digit of 9. This (in some situations) allows attackers to bypass access control that is based on IP addresses. NOTE: this issue exists because of an incomplete fix for CVE-2021-28918.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 4.9–9.1

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · OSV

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20US

affected products (10)

Products and version ranges known to be affected.

HCL BigFixall versionscert_bundDEcpe:/a:hcltech:bigfix:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:8
HCL AppScan Enterprise< 10.9.0cert_bundDE
JFrog Artifactory< 7.46.3cert_bundDE
n/a n/a≤ n/aenisa_euvdEU
netmask project netmask< 2.0.1nvdUScpe:2.3:a:netmask_project:netmask:*:*:*:*:*:*:*:*
npm netmask< 1.1.0osvUSpkg:npm/netmask
npm netmask< 2.0.1osvUSpkg:npm/netmask

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-1354Red Hat Enterprise Linux: Mehrere SchwachstellenDeutsch2021-05-04csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um beliebigen Programmcode auszuführen, Informationen offenzulegen, einen Denial of Service Zustand herbeizuführen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.
GHSA-4c7m-wxvm-r7gcImproper parsing of octal bytes in netmask2021-04-14ghsa · osvUS
Improper input validation of octal strings in netmask npm package v1.0.6 and below allows unauthenticated remote attackers to perform indeterminate SSRF, RFI, and LFI attacks on many of the dependent packages. A remote unauthenticated attacker can bypass packages relying on netmask to filter IPs and reach critical VPN or LAN hosts. :exclamation: NOTE: The fix for this issue was incomplete. A subsequent fix was made in version `2.0.1` which was assigned [CVE-2021-29418 / GHSA-pch5-whg9-qr2r](https://github.com/advisories/GHSA-pch5-whg9-qr2r). For complete protection from this vulnerability an upgrade to version 2.0.1 or later is recommended.
GHSA-pch5-whg9-qr2rnetmask npm package mishandles octal input data2021-03-29ghsa · osvUS
The netmask package before 2.0.1 for Node.js mishandles certain unexpected characters in an IP address string, such as an octal digit of 9. This (in some situations) allows attackers to bypass access control that is based on IP addresses. NOTE: this issue exists because of an incomplete fix for CVE-2021-28918.
CVE-2021-289182021-04-01vendor · osvUS
Improper input validation of octal strings in netmask npm package v1.0.6 and below allows unauthenticated remote attackers to perform indeterminate SSRF, RFI, and LFI attacks on many of the dependent packages. A remote unauthenticated attacker can bypass packages relying on netmask to filter IPs and reach critical VPN or LAN hosts.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund nvd NVD CVE.org MITRE

published 2021-03-30modified 2026-06-17

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+25171 more

references (14)

External citations — patches, advisories, analysis.

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