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golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing

🗓️ 11 Aug 2026 10:04:41Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 13 Views

golang.org/x/net/idna accepts Punycode labels decoding to ASCII-only hostnames, bypassing hostname validation checks.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.0aarch64rhc1:0.3.2-5.el10_0rhc-1:0.3.2-5.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lerhc1:0.3.2-5.el10_0rhc-1:0.3.2-5.el10_0.ppc64le.rpm
Red Hat Enterprise Linux10.0s390xrhc1:0.3.2-5.el10_0rhc-1:0.3.2-5.el10_0.s390x.rpm
Red Hat Enterprise Linux10.0x86_64rhc1:0.3.2-5.el10_0rhc-1:0.3.2-5.el10_0.x86_64.rpm
Red Hat Enterprise Linux10.0aarch64rhc-debuginfo1:0.3.2-5.el10_0rhc-debuginfo-1:0.3.2-5.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lerhc-debuginfo1:0.3.2-5.el10_0rhc-debuginfo-1:0.3.2-5.el10_0.ppc64le.rpm
Red Hat Enterprise Linux10.0s390xrhc-debuginfo1:0.3.2-5.el10_0rhc-debuginfo-1:0.3.2-5.el10_0.s390x.rpm
Red Hat Enterprise Linux10.0x86_64rhc-debuginfo1:0.3.2-5.el10_0rhc-debuginfo-1:0.3.2-5.el10_0.x86_64.rpm
Red Hat Enterprise Linux10.0aarch64rhc-debugsource1:0.3.2-5.el10_0rhc-debugsource-1:0.3.2-5.el10_0.aarch64.rpm
Red Hat Enterprise Linux10.0ppc64lerhc-debugsource1:0.3.2-5.el10_0rhc-debugsource-1:0.3.2-5.el10_0.ppc64le.rpm
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14 Sep 2026 15:18Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.19.6
EPSS0.00692
SSVC
13