CVE-2025-59465
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) }) }) ```
02 / AFFECTED SOFTWARE
Affected packages
87 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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) }) }) ```
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) }) }) ```
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) }) }) ```
05 / REFERENCES
Further evidence
- https://access.redhat.com/errata/RHSA-2026:1842
- https://access.redhat.com/errata/RHSA-2026:1843
- https://access.redhat.com/errata/RHSA-2026:2420
- https://access.redhat.com/errata/RHSA-2026:2421
- https://access.redhat.com/errata/RHSA-2026:2422
- https://access.redhat.com/errata/RHSA-2026:2767
- https://access.redhat.com/errata/RHSA-2026:2768
- https://access.redhat.com/errata/RHSA-2026:2781
- https://access.redhat.com/errata/RHSA-2026:2782
- https://access.redhat.com/errata/RHSA-2026:2783
- https://access.redhat.com/errata/RHSA-2026:2864
- https://access.redhat.com/errata/RHSA-2026:2899
- https://access.redhat.com/errata/RHSA-2026:6402
- https://access.redhat.com/errata/RHSA-2026:6431
- https://access.redhat.com/errata/RHSA-2026:7386
- https://access.redhat.com/errata/RHSA-2026:7387
- https://access.redhat.com/security/cve/CVE-2025-59465
- https://bugzilla.redhat.com/show_bug.cgi?id=2431349
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59465.json
- https://nodejs.org/en/blog/vulnerability/december-2025-security-releases
- https://nvd.nist.gov/vuln/detail/CVE-2025-59465
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-59465.json