libcurl 8.18.0 < 8.21.0 QUIC UDP Denial of Service (CVE-2026-11352)

The version of libcurl installed on the remote host is 8.18.0 prior to 8.21.0. It is, therefore, affected by a denial of service vulnerability: - An issue in curl's QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client...

SUSE-SU-2026:22553-1 Security update for curl

This update for curl fixes the following issues - CVE-2026-8286: wrong STARTTLS connection reuse bsc1268402. - CVE-2026-8458: wrong reuse for different services bsc1268407. - CVE-2026-8924: traling dot domain super cookie bsc1268409. - CVE-2026-8927: env-set cross-proxy Digest auth state leak...

curl: libcurl: curl/libcurl: Remote denial of service via QUIC UDP receive function vulnerability

A flaw was found in curl and libcurl. A malicious HTTP/3 server can exploit an issue in the QUIC UDP receive function by continuously streaming empty UDP datagrams. This can lead to a remote denial of service DoS against a curl or libcurl client, as the helper function discards zero-length UDP...

CVE-2026-42530

A flaw was found in the ngxhttpv3module module of NGINX. When NGINX is configured to use the HTTP/3 QUIC module, an attacker can use a specially crafted HTTP/3 session to reopen a QPACK encoder stream and cause a use-after-free issue, potentially allowing code execution or a denial of service by...

Use-after-free in HTTP/3

Use-after-free in HTTP/3 Severity: major CVE-2026-42530 Not vulnerable: 1.31.2+ Vulnerable: 1.31.0-1.31.1...

nginx -- multiple vulnerabilities

The nginx developers report: A use-after-free vulnerability when using HTTP/3 and processing a specially crafted QUIC session may allow memory corruption or a segmentation fault in a worker process CVE-2026-42530. A heap memory buffer overflow vulnerability when using the "ignoreinvalidheaders...

nginx-devel -- multiple vulnerabilities

The nginx project reports: nginx 1.31.0 fixes multiple security issues affecting HTTP/2 proxying, rewrite handling, SCGI/uWSGI response handling, charset conversion, HTTP/3 connection migration, and OCSP resolver response processing...

Ubuntu 24.04 LTS / 25.10 / 26.04 LTS : HAProxy vulnerability (USN-8208-1)

The remote Ubuntu 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8208-1 advisory. Martino Spagnuolo discovered that HAProxy did not check received body lengths in the HTTP/3 parser. A remote attacker could possibly use this...

EUVD-2026-21997

An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be...

Fedora 44 : nginx / nginx-mod-brotli / nginx-mod-fancyindex / etc (2025-530e10091c)

The remote Fedora 44 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2025-530e10091c advisory. Changes with nginx 1.28.1 23 Dec 2025 Security: processing of a specially crafted login/password when using the none authentication method in the...

GO-2025-4233 HTTP/3 QPACK Header Expansion DoS in github.com/quic-go/quic-go

HTTP/3 QPACK Header Expansion DoS in github.com/quic-go/quic-go...

H2O 安全漏洞

H2O is an in-memory platform for distributed, scalable machine learning open-sourced by H2O.ai. H2O suffers from a security vulnerability that stems from a possible crash due to assertion failure when configured as a reverse proxy and a client cancels an HTTP/3 request, which can be exploited by ...

Use After Free

Overview Microsoft.AspNetCore.App.Runtime.win-arm64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Use After Free that could allow remote code execution...

Use After Free

Overview Microsoft.AspNetCore.App.Runtime.osx-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Use After Free that could allow remote code execution...

Use After Free

Overview Microsoft.AspNetCore.App.Runtime.linux-musl-x64 is a package providing a default set of APIs for building an ASP.NET Core application. Contains assets used for self-contained deployments. Affected versions of this package are vulnerable to Use After Free through the handling of HTTP/3...

DEBIAN-CVE-2024-34161

When NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module and the network infrastructure supports a Maximum Transmission Unit MTU of 4096 or greater without fragmentation, undisclosed QUIC packets can cause NGINX worker processes to leak previously freed memory...

ALPINE-CVE-2024-31079

When NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module, undisclosed HTTP/3 requests can cause NGINX worker processes to terminate or cause other potential impact. This attack requires that a request be specifically timed during the connection draining process, which the attacke...

The vulnerability of the HTTP/3 network protocol implementation in Microsoft Windows operating systems allows a perpetrator to trigger a service failure.

The vulnerability of the HTTP/3 network protocol implementation in Microsoft Windows systems is related to an uncontrolled resource consumption. Exploiting this vulnerability can allow a malicious actor to cause service interruptions...

PT-2022-1791 · Microsoft +5 · Net 5.0 +7

Name of the Vulnerable Software and Affected Versions: .NET 6.0 versions 6.0.0 through 6.0.1 .NET 5.0 versions 5.0.0 through 5.0.13 Description: A Denial of Service issue exists in .NET 6.0 and .NET 5.0 when the Kestrel web server processes certain HTTP/2 and HTTP/3 requests. This is due to...