Remote DoS in Node.js HTTP/2 via malformed HEADERS frame
CVE-2025-59465 is a high-severity denial-of-service vulnerability in Node.js HTTP/2 server handling. A remote attacker can send a malformed HTTP/2 HEADERS frame containing oversized, invalid HPACK data, which causes Node.js to hit an unhandled TLSSocket error with code ECONNRESET. Instead of safely terminating only the offending connection, the process can crash. The issue is specifically described as affecting HTTP/2 over TLS and is primarily exposed in applications that do not register explicit error handlers on secure sockets, such as sockets surfaced through the server's secureConnection event. Reported affected release lines are Node.js 20.x, 22.x, 24.x, and 25.x.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
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Unknown
A high-severity Node.js vulnerability that could be exploited to trigger a remote denial-of-service (no further technical details provided in the content).
High-severity remote denial-of-service in Node.js HTTP/2 servers via malformed HEADERS frames leading to unhandled TLSSocket errors and server crash.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.