CVE-2026-33814

HIGH 7.5

Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.

Vendor	golang.org/x/net
Product	golang.org/x/net/http2
Published	May 7, 2026
Last Updated	Aug 5, 2026

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Affected Versions

golang.org/x/net / golang.org/x/net/http2

0 < 0.53.0

Go standard library / net/http

0 < 1.25.10 1.26.0-0 < 1.26.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/cl/761581 go.dev: https://go.dev/cl/761640 go.dev: https://go.dev/issue/78476 groups.google.com: https://groups.google.com/g/golang-announce/c/qcCIEXso47M pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-4918 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-33814 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2467815 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33814.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:34342 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:43692 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:23262 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:23264 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42644 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:33120 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:33123 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:33142 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:33150 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:50205 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37387

Credits

Marwan Atia ([email protected])