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

🗓️ 12 Aug 2026 16:02:34Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 10 Views

golang.org/x/net/idna incorrectly accepts ASCII-only Punycode labels, enabling privilege escalation via hostname validation bypass.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.6aarch64rhc1:0.2.7-1.el9_6.5rhc-1:0.2.7-1.el9_6.5.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lerhc1:0.2.7-1.el9_6.5rhc-1:0.2.7-1.el9_6.5.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xrhc1:0.2.7-1.el9_6.5rhc-1:0.2.7-1.el9_6.5.s390x.rpm
Red Hat Enterprise Linux9.6x86_64rhc1:0.2.7-1.el9_6.5rhc-1:0.2.7-1.el9_6.5.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64rhc-debuginfo1:0.2.7-1.el9_6.5rhc-debuginfo-1:0.2.7-1.el9_6.5.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lerhc-debuginfo1:0.2.7-1.el9_6.5rhc-debuginfo-1:0.2.7-1.el9_6.5.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xrhc-debuginfo1:0.2.7-1.el9_6.5rhc-debuginfo-1:0.2.7-1.el9_6.5.s390x.rpm
Red Hat Enterprise Linux9.6x86_64rhc-debuginfo1:0.2.7-1.el9_6.5rhc-debuginfo-1:0.2.7-1.el9_6.5.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64rhc-debugsource1:0.2.7-1.el9_6.5rhc-debugsource-1:0.2.7-1.el9_6.5.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lerhc-debugsource1:0.2.7-1.el9_6.5rhc-debugsource-1:0.2.7-1.el9_6.5.ppc64le.rpm
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02 Sep 2026 15:09Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.19.6
EPSS0.00692
SSVC
10