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 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

The perl-URI module (versions before 5.36 ) is vulnerable to a security bypass due to a missing Unicode normalization in the nameprep function. While the software lowercases host labels, it fails to normalize them to Form C as required by RFC 5891 . This allows non-NFC host names to be encoded in...

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. 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...

PT-2026-89663

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...

PT-2026-83938

Name of the Vulnerable Software and Affected Versions URI for Perl versions prior to 5.36 Description Missing normalization in nameprep causes non-NFC host names to be encoded into non-standard punycode labels. While nameprep lowercases host labels, it fails to perform Unicode normalization to Fo...

CVE-2026-19953: Improper Validation of Unsafe Equivalence in Input

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: Improper Validation of Unsafe Equivalence in Input

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...

Fedora 43 : perl-URI (2026-09941e744b)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-09941e744b advisory. 5.36 - Apply Unicode NFC normalization in URI::idna nameprep so IDNA host encoding matches other clients instead of emitting a non-standard, non-round-trippi...

Fedora 44 : perl-URI (2026-32b0d26c4c)

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-32b0d26c4c advisory. 5.36 - Apply Unicode NFC normalization in URI::idna nameprep so IDNA host encoding matches other clients instead of emitting a non-standard, non-round-trippi...