Vulnerabilities
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CVE Vulnerabilities

CVE-2026-78663

Multiple Operations on Resource in Single-Operation Context

Published: Oct 08, 2026 | Modified: Oct 09, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
5.3 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-78663
CWEhttps://cwe.mitre.org/data/definitions/675.html

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 can exploit this to bypass the configured connection-level flow control limit (MaxReceiveBufferPerConnection). Total buffered data is still limited by the concurrent stream limit and stream-level flow control.

Weakness

The product performs the same operation on a resource two or more times, when the operation should only be applied once.

Affected Software

NameVendorStart VersionEnd Version
Red Hat Enterprise Linux 10RedHatgolang-0:1.26.10-1.el10_2*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatgolang-0:1.26.10-1.el10_0*
Red Hat Enterprise Linux 8RedHatgo-toolset:rhel8-8100020261020054335.a3795dee*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatgo-toolset:rhel8-8040020261027035356.522a0ee4*
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRedHatgo-toolset:rhel8-8040020261027035356.522a0ee4*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatgo-toolset:rhel8-8060020261020153812.97d7f71f*
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRedHatgo-toolset:rhel8-8060020261020153812.97d7f71f*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatgo-toolset:rhel8-8080020261020152326.6b4b45d8*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatgo-toolset:rhel8-8080020261020152326.6b4b45d8*
Red Hat Enterprise Linux 9RedHatgolang-0:1.26.10-1.el9_8*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatgolang-0:1.26.10-1.el9_2*
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRedHatgolang-0:1.26.10-1.el9_4*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatgolang-0:1.26.10-1.el9_6*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-cni-rhel9:1792912264*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-pilot-rhel9:1792911614*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1792951544*
Red Hat OpenShift Service Mesh 3.0RedHatopenshift-service-mesh/istio-rhel9-operator:1792911464*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-cni-rhel9:1792912455*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-pilot-rhel9:1792912343*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1792937000*
Red Hat OpenShift Service Mesh 3.1RedHatopenshift-service-mesh/istio-rhel9-operator:1792911843*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-cni-rhel9:1792912393*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-pilot-rhel9:1792912862*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1792935548*
Red Hat OpenShift Service Mesh 3.2RedHatopenshift-service-mesh/istio-rhel9-operator:1792912242*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-cni-rhel9:1792912245*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-pilot-rhel9:1792911805*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1792944701*
Red Hat OpenShift Service Mesh 3.3RedHatopenshift-service-mesh/istio-rhel9-operator:1792911854*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-cni-rhel9:1792912137*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-pilot-rhel9:1792911629*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-proxyv2-rhel9:1792935452*
Red Hat OpenShift Service Mesh 3.4RedHatopenshift-service-mesh/istio-rhel9-operator:1792912572*
Golang-1.22Ubuntuesm-apps/focal*
Golang-1.22Ubuntuesm-apps/jammy*
Golang-1.22Ubuntujammy*
Golang-1.22Ubuntunoble*

References

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