CVE-2026-58055
⚪ Do wiadomości
Błąd w nghttp2's nghttpx umożliwia atak HTTP smuggling i zanieczyszczenie kolejki odpowiedzi.
CVSS
5.4
EPSS
0.2%
Exploit
none
Vendor
Opis źródłowy (NVD)
nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting ambiguous message in the attacker's favor enables HTTP request/response smuggling and cross-client response-queue poisoning.
brak
Brak patcha
Źródła i daty
| Źródło | Wartość |
|---|---|
| NVD – CVSS | 5.4 |
| CISA KEV (aktywnie wykorzystywane) | Nie |
| FIRST EPSS (prawdopodobieństwo exploita) | 0.2% |
| Opublikowano (NVD) | 2026-06-28 02:16:32 UTC |
| Ostatnia modyfikacja (NVD) | 2026-06-29 19:27:47 UTC |
Referencje
- https://github.com/bikini/exploitarium/tree/main/nghttp2-nghttpx-upgrade-queue-poison-poc (disclosure@vulncheck.com)
- https://github.com/nghttp2/nghttp2/commit/ab28105c4a0197da24f8bfc414bc116055249e1e (disclosure@vulncheck.com)
- https://www.vulncheck.com/advisories/nghttp2-nghttpx-http-request-response-smuggling-via-upgrade-request-with-content-length (disclosure@vulncheck.com)