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Vendor

nghttp2

5 known vulnerabilities.

nghttp2 at a glance

Last 12 months
2
Critical · all time
0
Exploited · all time
0
Public exploit · all time
0
New vulnerabilities per month · last 12 months
0 1 1 December 2025: 0 vulnerabilities Dec 2025 January 2026: 0 vulnerabilities February 2026: 0 vulnerabilities March 2026: 1 vulnerability Mar April 2026: 0 vulnerabilities May 2026: 0 vulnerabilities June 2026: 1 vulnerability Jun July 2026: 0 vulnerabilities August 2026: 0 vulnerabilities September 2026: 0 vulnerabilities Sep October 2026: 0 vulnerabilities November 2026: 0 vulnerabilities
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Products

nghttp2 5
All Critical High Medium Low Exploited only Public exploit

5 results · Feed

  • Medium 5.4
    CVE-2026-58055

    nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length

    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 …

    nghttp2 nghttp2 nghttp2 nghttp2 Debian Ubuntu Alpine
  • High 7.5
    CVE-2026-27135

    nghttp2 Denial of service: Assertion failure due to the missing state validation

    nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2…

    nghttp2 nghttp2 nghttp2 nghttp2 Debian Ubuntu Alpine
  • Medium 5.3
    CVE-2024-28182 EPSS 82%

    Reading unbounded number of HTTP/2 CONTINUATION frames to cause excessive CPU usage

    nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. The nghttp2 library prior to version 1.61.0 keeps reading the unbounded number of HTTP/2 CONTINUATION frames even after a stream is reset to keep HPACK context in sync. This cause…

    nghttp2 nghttp2 nghttp2 nghttp2 Debian Ubuntu
  • Low 3.7
    CVE-2020-11080

    Denial of service in nghttp2

    In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) o…

    nghttp2 nghttp2 nodejs nodejs Debian Ubuntu Alpine
  • Unscored —
    CVE-2016-1544

    nghttp2 before 1.7.1 allows remote attackers to cause a denial of service (memory exhaustion).

    nghttp2 nghttp2 nghttp2 Debian