CVE-2026-92598 Nodemailer before 9.1.0 IDN/Punycode Domain Allow-list Bypass

Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than standards-compliant parsers. Attackers can craft recipient addresses with invisible characters or compatibility mappings...

CLEANSTART-2026-VO23255 ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label

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

openSUSE 16 Security Update : perl-URI (openSUSE-SU-2026:21773-1)

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21773-1 advisory. This update for perl-URI fixes the following issue: - CVE-2026-19953: non-NFC host names encoded to non-standard punycode labels due to missing...

CLEANSTART-2026-PE88816 ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label

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

URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep

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SUSE CVE-2026-19953

URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep. nameprep lowercases each host label but performs no Unicode normalization. IDNA requires a label to be normalized to Form C before it is encoded RFC 5891, so a label...

CVE-2026-19953

URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep. nameprep lowercases each host label but performs no Unicode normalization. IDNA requires a label to be normalized to Form C before it is encoded RFC 5891, so a label...

AZL-98562 CVE-2026-19953 affecting package perl-URI 5.21-2

URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep. nameprep lowercases each host label but performs no Unicode normalization. IDNA requires a label to be normalized to Form C before it is encoded RFC 5891, so a label...

EUVD-2026-68681

URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep. nameprep lowercases each host label but performs no Unicode normalization. IDNA requires a label to be normalized to Form C before it is encoded RFC 5891, so a label...

CVE-2026-19953 URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep

URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep. nameprep lowercases each host label but performs no Unicode normalization. IDNA requires a label to be normalized to Form C before it is encoded RFC 5891, so a label...

CVE-2026-19953

CVE-2026-19953 affects Perl URI versions before 5.36 . The root cause lies in the nameprep function, which lowercases host labels but omits the NFC Unicode normalization required by IDNA (RFC 5891) before punycode encoding. As a result, non-NFC host labels encode to a non-standard A-label that do...

CVE-2026-19953 URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep

URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep. nameprep lowercases each host label but performs no Unicode normalization. IDNA requires a label to be normalized to Form C before it is encoded RFC 5891, so a label...

Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

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AZL-87393 CVE-2026-39821 affecting package cert-manager for versions less than 1.12.15-9

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...

AZL-87798 CVE-2026-39821 affecting package golang for versions less than 1.26.4-3

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...

EUVD-2005-0239

Malware in sbrugna...

EUVD-2005-0235

Malware in sbrugna...

EUVD-2023-54262

Malicious code in bioql PyPI...

CVE-2024-54158

In JetBrains YouTrack before 2024.3.52635 potential spoofing attack was possible via lack of Punycode encoding...

CVE-2023-4399

Grafana is an open-source platform for monitoring and observability. In Grafana Enterprise, Request security is a deny list that allows admins to configure Grafana in a way so that the instance doesn’t call specific hosts. However, the restriction can be bypassed used punycode encoding of the...