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CVE-2026-39821

🗓️ 22 May 2026 15:01:21Reported by Alpine Linux Development TeamType 
alpinelinux
 alpinelinux
🔗 security.alpinelinux.org👁 12 Views

ToASCII and ToUnicode accept punycode labels that decode to ASCII, enabling idna escalation.

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Alpine Linuxanyanyprometheus3.5.4-r0prometheus-3.5.4-r0.apk

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28 Aug 2026 16:17Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.19.6
EPSS0.00692
SSVC
12