{"schema_version":"1.7.2","id":"OESA-2026-3590","modified":"2026-09-05T15:02:54Z","published":"2026-09-05T15:02:54Z","upstream":["CVE-2026-19953"],"summary":"perl-URI security update","details":"This module implements the URI class. Objects of this class represent "Uniform Resource Identifier references" as specified in RFC 2396 (and updated by RFC 2732).\r\n\r\nSecurity Fix(es):\n\nURI 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 that is not already in NFC is encoded to a different A-label than its normalized form. A label built from the precomposed Devanagari sequence U+0958 U+093E encodes to xn--72b5c without normalization but to xn--11b2fg after NFC normalization, and xn--72b5c does not round-trip back to the original label. Any caller that reads host() from a URI built from untrusted input and uses it for a security decision (an allow or deny list, an SSRF filter, deduplication, a cache key) sees the non-standard label, while a client that fetches the same URL resolves the NFC form, so the check and the fetch can disagree about the host.(CVE-2026-19953)","affected":[{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"perl-URI","purl":"pkg:rpm/openEuler/perl-URI&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10-3.oe2203sp4"}]}],"ecosystem_specific":{"noarch":["perl-URI-5.10-3.oe2203sp4.noarch.rpm","perl-URI-help-5.10-3.oe2203sp4.noarch.rpm"],"src":["perl-URI-5.10-3.oe2203sp4.src.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3590"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19953"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"database_specific":{"severity":"Critical"}}