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CVE-2026-39821

קריטית 9.6

תיאור (מקור, אנגלית)

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com".

מדדים

CVSS 3.1
9.6 (CRITICAL) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
EPSS — סבירות ניצול
1% (אחוזון 100) נכון ל-1/10/2026
CWE
CWE-1289

מוצרים מושפעים

golang: net

קישורים