Medium severity · published Mar 30, 2026
CVE-2026-21711
A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths…
5.3
CVSS
0.2%
EPSS
No
On KEV
Description
A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.
As a result, code running under `--permission` without `--allow-net` can create and expose local IPC endpoints, allowing communication with other processes on the same host outside of the intended network restriction boundary.
This vulnerability affects Node.js **25.x** processes using the Permission Model where `--allow-net` is intentionally omitted to restrict network access. Note that `--allow-net` is currently an experimental feature.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
node · nodejs
25.8.1 through 25.8.1; 4.0 before 4.*; 5.0 before 5.*; 6.0 before 6.*; 7.0 before 7.*; 8.0 before 8.*; +11 more · source: vendor
NO
Node.js · Nodejs
before 20.0.0; 25.0.0 through 25.8.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-21711
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-21711
Vendor Advisory
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases
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