containerd

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• Critical 9.1
  CVE-2026-78663

  Double flow control refund on HTTP/2 server streams in net/http

  The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. A malicious client…

  Go standard library golang.org/x/net net/http golang.org/x/net/http2 Debian Ubuntu Azure Linux Alpine Wolfi Go
  Oct 8, 2026
• Critical 9.4
  CVE-2026-53488

  containerd CRI plugin: — image-config `LABEL` flows to restart-monitor `binary://` logger: host-root command execution from an image pull

  containerd is an open-source container runtime. In versions prior to 1.7.33, 2.3.2, 2.2.5, 2.1.9, and 2.0.10 the CRI plugin propagates labels from an image config (LABEL instruction in Dockerfile) to a container without validation. This may result in executin…

  containerd containerd zot kubescape Debian Ubuntu Azure Linux Alpine Wolfi Go
  Jul 1, 2026
• Critical 9.6
  CVE-2026-39821

  Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

  The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege …

  Go standard library golang.org/x/net net/http net/http/internal/http2 Debian Ubuntu Azure Linux Alpine Wolfi Go
  May 22, 2026