CLEANSTART-2026-LK25174

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CLEANSTART-2026-LK25174

Summary: ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label

Details: Multiple security vulnerabilities affect the istio package. The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. See references for individual vulnerability details.

References: https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-LK25174.json, https://osv.dev/vulnerability/CVE-2025-15558, https://osv.dev/vulnerability/CVE-2026-25680, https://osv.dev/vulnerability/CVE-2026-25681, https://osv.dev/vulnerability/CVE-2026-27136, https://osv.dev/vulnerability/CVE-2026-27145, https://osv.dev/vulnerability/CVE-2026-33186, https://osv.dev/vulnerability/CVE-2026-33811, https://osv.dev/vulnerability/CVE-2026-33814, https://osv.dev/vulnerability/CVE-2026-33818, https://osv.dev/vulnerability/CVE-2026-35469, https://osv.dev/vulnerability/CVE-2026-39817, https://osv.dev/vulnerability/CVE-2026-39819, https://osv.dev/vulnerability/CVE-2026-39820, https://osv.dev/vulnerability/CVE-2026-39821, https://osv.dev/vulnerability/CVE-2026-39823, https://osv.dev/vulnerability/CVE-2026-39824, https://osv.dev/vulnerability/CVE-2026-39825, https://osv.dev/vulnerability/CVE-2026-39826, https://osv.dev/vulnerability/CVE-2026-39827, https://osv.dev/vulnerability/CVE-2026-39828, https://osv.dev/vulnerability/CVE-2026-39829, https://osv.dev/vulnerability/CVE-2026-39830, https://osv.dev/vulnerability/CVE-2026-39831, https://osv.dev/vulnerability/CVE-2026-39832, https://osv.dev/vulnerability/CVE-2026-39833, https://osv.dev/vulnerability/CVE-2026-39834, https://osv.dev/vulnerability/CVE-2026-39835, https://osv.dev/vulnerability/CVE-2026-39836, https://osv.dev/vulnerability/CVE-2026-40179, https://osv.dev/vulnerability/CVE-2026-42151, https://osv.dev/vulnerability/CVE-2026-42154, https://osv.dev/vulnerability/CVE-2026-42499, https://osv.dev/vulnerability/CVE-2026-42501, https://osv.dev/vulnerability/CVE-2026-42502, https://osv.dev/vulnerability/CVE-2026-42504, https://osv.dev/vulnerability/CVE-2026-42506, https://osv.dev/vulnerability/CVE-2026-42507, https://osv.dev/vulnerability/CVE-2026-42508, https://osv.dev/vulnerability/CVE-2026-44903, https://osv.dev/vulnerability/CVE-2026-46595, https://osv.dev/vulnerability/CVE-2026-46597, https://osv.dev/vulnerability/CVE-2026-46598, https://osv.dev/vulnerability/CVE-2026-46600, https://osv.dev/vulnerability/CVE-2026-56852, https://osv.dev/vulnerability/CVE-2026-56853, https://osv.dev/vulnerability/CVE-2026-56858, https://osv.dev/vulnerability/CVE-2026-56859, https://osv.dev/vulnerability/CVE-2026-56860, https://osv.dev/vulnerability/CVE-2026-56862, https://osv.dev/vulnerability/ghsa-259r-337f-4rfw, https://osv.dev/vulnerability/ghsa-8rm2-7qqf-34qm, https://osv.dev/vulnerability/ghsa-fw8g-cg8f-9j28, https://osv.dev/vulnerability/ghsa-gcjh-h69q-9w9g, https://osv.dev/vulnerability/ghsa-hrxh-6v49-42gf, https://osv.dev/vulnerability/ghsa-p436-gjf2-799p, https://osv.dev/vulnerability/ghsa-p77j-4mvh-x3m3, https://osv.dev/vulnerability/ghsa-vffh-x6r8-xx99, https://osv.dev/vulnerability/ghsa-wg65-39gg-5wfj, https://nvd.nist.gov/vuln/detail/CVE-2025-15558, https://nvd.nist.gov/vuln/detail/CVE-2026-25680, https://nvd.nist.gov/vuln/detail/CVE-2026-25681, https://nvd.nist.gov/vuln/detail/CVE-2026-27136, https://nvd.nist.gov/vuln/detail/CVE-2026-27145, https://nvd.nist.gov/vuln/detail/CVE-2026-33186, https://nvd.nist.gov/vuln/detail/CVE-2026-33811, https://nvd.nist.gov/vuln/detail/CVE-2026-33814, https://nvd.nist.gov/vuln/detail/CVE-2026-33818, https://nvd.nist.gov/vuln/detail/CVE-2026-35469, https://nvd.nist.gov/vuln/detail/CVE-2026-39817, https://nvd.nist.gov/vuln/detail/CVE-2026-39819, https://nvd.nist.gov/vuln/detail/CVE-2026-39820, https://nvd.nist.gov/vuln/detail/CVE-2026-39821, https://nvd.nist.gov/vuln/detail/CVE-2026-39823, https://nvd.nist.gov/vuln/detail/CVE-2026-39824, https://nvd.nist.gov/vuln/detail/CVE-2026-39825, https://nvd.nist.gov/vuln/detail/CVE-2026-39826, https://nvd.nist.gov/vuln/detail/CVE-2026-39827, https://nvd.nist.gov/vuln/detail/CVE-2026-39828, https://nvd.nist.gov/vuln/detail/CVE-2026-39829, https://nvd.nist.gov/vuln/detail/CVE-2026-39830, https://nvd.nist.gov/vuln/detail/CVE-2026-39831, https://nvd.nist.gov/vuln/detail/CVE-2026-39832, https://nvd.nist.gov/vuln/detail/CVE-2026-39833, https://nvd.nist.gov/vuln/detail/CVE-2026-39834, https://nvd.nist.gov/vuln/detail/CVE-2026-39835, https://nvd.nist.gov/vuln/detail/CVE-2026-39836, https://nvd.nist.gov/vuln/detail/CVE-2026-40179, https://nvd.nist.gov/vuln/detail/CVE-2026-42151, https://nvd.nist.gov/vuln/detail/CVE-2026-42154, https://nvd.nist.gov/vuln/detail/CVE-2026-42499, https://nvd.nist.gov/vuln/detail/CVE-2026-42501, https://nvd.nist.gov/vuln/detail/CVE-2026-42502, https://nvd.nist.gov/vuln/detail/CVE-2026-42504, https://nvd.nist.gov/vuln/detail/CVE-2026-42506, https://nvd.nist.gov/vuln/detail/CVE-2026-42507, https://nvd.nist.gov/vuln/detail/CVE-2026-42508, https://nvd.nist.gov/vuln/detail/CVE-2026-44903, https://nvd.nist.gov/vuln/detail/CVE-2026-46595, https://nvd.nist.gov/vuln/detail/CVE-2026-46597, https://nvd.nist.gov/vuln/detail/CVE-2026-46598, https://nvd.nist.gov/vuln/detail/CVE-2026-46600, https://nvd.nist.gov/vuln/detail/CVE-2026-56852, https://nvd.nist.gov/vuln/detail/CVE-2026-56853, https://nvd.nist.gov/vuln/detail/CVE-2026-56858, https://nvd.nist.gov/vuln/detail/CVE-2026-56859, https://nvd.nist.gov/vuln/detail/CVE-2026-56860, https://nvd.nist.gov/vuln/detail/CVE-2026-56862