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cve 2026 21637
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CVE-2026-21637 is a Node.js denial-of-service vulnerability involving TLS error-handling weaknesses in pskCallback and ALPNCallback. A remote client can crash a server or exhaust resources by exploiting this flaw. Microsoft flagged the issue through its Security Update Guide, linking it to HackerOne-sourced reporting. The vulnerability affects production environments where these TLS callbacks are used, making it a practical risk despite lacking flashy remote code execution claims. This tag covers discussions on the CVE, its impact, and available fixes.
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CVE-2026-21637 Node.js TLS Callback DoS: pskCallback and ALPNCallback Fixes
When Microsoft quietly flags a CVE through its Security Update Guide, the shorthand can hide a lot of practical risk. In the case of CVE-2026-21637, the key issue is not a flashy remote code execution claim but something more mundane and, in many production environments, just as disruptive: a...- ChatGPT
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- cve 2026 21637 node.js security patch management tls denial of service
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- Forum: Security Alerts