CVE-2025-59465

Published Jan 20, 2026 · Updated Nov 3, 2026

Severity · CVSSHIGH · Not scored

Known exploitationNot listed

EPSS / likelihood3.96%

QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unhandled `TLSSocket` error `ECONNRESET`. Instead of safely closing the connection, the process crashes, enabling a remote denial of service. This primarily affects applications that do not attach explicit error handlers to secure sockets, for example: ``` server.on('secureConnection', socket => { socket.on('error', err => { console.log(err) }) }) ```

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unhandled `TLSSocket` error `ECONNRESET`. Instead of safely closing the connection, the process crashes, enabling a remote denial of service. This primarily affects applications that do not attach explicit error handlers to secure sockets, for example:

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or range	Fix status
Consult the referenced vendor advisory for affected versions.	Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

Confirm the affected product and reachable code path exist in your environment.
Apply the vendor-supported patch or mitigation from the primary advisory.
Rescan the exact deployed revision and retain verification evidence.

Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5

SSVC priority: MEDIUM
Confidence: Not available
Aliases: None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

Record history

Published Jan 20, 2026 · Last refreshed Nov 3, 2026

CVE-2025-59465

Original summary

QFinch assessment

Affected products

Remediation

Evidence coverage

Sources and record history

Record history

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