CVE-2026-126051
Published:November 11, 2026
Updated:November 12, 2026
A deferred-callback use-after-destroy in Node.js TLS server handshake handling allows a remote, unauthenticated attacker to terminate the server process. When a TLS server uses any of the SNICallback, OCSPRequest, newSession, or resumeSession hooks, or server.addContext(), the corresponding OpenSSL callbacks are deferred, and the deferred code does not handle the underlying socket being destroyed between scheduling and execution. By sending a client hello that reaches the vulnerable path (for example, no SNI together with an OCSP request) followed by padding and a socket FIN, an attacker makes OpenSSL deliver the client hello and the end-of-file in the same tick, so the socket is destroyed before the deferred callback runs and the process raises an uncaught exception instead of emitting an 'error' event. This vulnerability affects Node.js 26.x and 24.x.
Affected Packages
nodejs (CONDA):
Affected version(s) =24.22.1 <24.22.3Fix Suggestion:
Update to version 24.22.3nodejs (CONDA):
Affected version(s) >=26.8.0 <26.13.1Fix Suggestion:
Update to version 26.13.1https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v24.22.0 <v24.22.3Fix Suggestion:
Update to version v24.22.3https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v26.8.0 <v26.13.1Fix Suggestion:
Update to version v26.13.1Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
NULL Pointer Dereference
EPSS
Base Score:
0.77