En resumen
- CVE-2026-6733 es una vulnerabilidad BAJO (CVSS 3.7) que afecta a undici (nodejs), undici.
- Probabilidad de explotación en los próximos 30 días (EPSS): 0.22%, mayor que el 12.5% de las vulnerabilidades.
- Solución: actualizar a 7.28.0, 8.5.0, 6.27.0 o posterior.
| Package | Affected versions | Patched versions |
|---|
| undici | ≥ 7.0.0, < 7.28.0≥ 8.0.0, < 8.5.0< 6.27.0
| 7.28.08.5.06.27.0
|
| undici npm | ≥ 7.0.0, < 7.28.0≥ 8.0.0, < 8.5.0< 6.27.0
| 7.28.08.5.06.27.0
|
Description
Impact
Undici's HTTP/1.1 client is vulnerable to response queue poisoning on reused keep-alive sockets. An attacker-controlled upstream server can inject an unsolicited HTTP/1.1 response onto an idle socket after a request completes. When the client dispatches the next request on that socket, it associates the injected response with the new request, causing responses to be delivered to the wrong requests.
This requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse.
Patches
Upgrade to undici v6.27.0, v7.28.0 or v8.5.0.
Workarounds
Disable keep-alive connection reuse by setting keepAliveTimeout: 0 on the Client or Pool.
NVD description
Impact:
Undici's HTTP/1.1 client is vulnerable to response queue poisoning on reused keep-alive sockets. An attacker-controlled upstream server can inject an unsolicited HTTP/1.1 response onto an idle socket after a request completes. When the client dispatches the next request on that socket, it associates the injected response with the new request, causing responses to be delivered to the wrong requests.
This requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse.
Patches:
Upgrade to undici v6.26.0, v7.28.0 or v8.5.0.
Workarounds:
Disable keep-alive connection reuse by setting keepAliveTimeout: 0 on the Client or Pool.
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