PT-2026-3360 · Node.Js+2 · Node.Js+2
0Xmaxhax
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Published
2026-01-01
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Updated
2026-05-18
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CVE-2026-21637
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Node.js versions (affected versions not specified)
Description
A flaw in Node.js TLS error handling can allow remote attackers to crash or exhaust resources of a TLS server when
pskCallback or ALPNCallback are in use. Synchronous exceptions thrown during these callbacks bypass standard TLS error handling paths, potentially leading to denial of service. Because these callbacks process attacker-controlled input during the TLS handshake, a remote client can repeatedly trigger the issue. The issue is related to incorrect cleanup or release of resources within the pskCallback() and ALPNCallback() functions.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
DoS
Improper Resource Release
Resource Exhaustion
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Related Identifiers
Affected Products
Node.Js
Red Os
Rocky Linux