ubuntu-cve-2026-46644
Vulnerability from osv_ubuntu
Published
2026-07-14 21:16
Modified
2026-07-15 17:52
Summary
Details
Symfony Polyfill backports PHP features and provides compatibility layers for extensions and functions. From 1.17.1 until 1.38.1, symfony/polyfill-intl-idn accepts xn-- labels whose Punycode payload is empty or decodes to ASCII-only code points because Idn::process() does not enforce the UTS #46 revision 33 requirement that decoded ACE labels contain at least one non-ASCII code point. Originally unequal domain names can be regarded as equal, which can lead to blacklist bypassing, inconsistent URL parsing, and server-side request forgery in applications using the polyfill to canonicalise or compare hostnames. This issue is fixed in version 1.38.1.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "php-symfony-polyfill",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-apcu",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-iconv",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-intl-grapheme",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-intl-icu",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-intl-normalizer",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-mbstring",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-php54",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-php55",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-php56",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-php70",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-php71",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-php72",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-util",
"binary_version": "1.6.0-2"
},
{
"binary_name": "php-symfony-polyfill-xml",
"binary_version": "1.6.0-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "php-symfony-polyfill",
"purl": "pkg:deb/ubuntu/php-symfony-polyfill@1.6.0-2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.2.0-1ubuntu1",
"1.6.0-1",
"1.6.0-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "php-symfony-polyfill",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-apcu",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-ctype",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-iconv",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-intl-grapheme",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-intl-icu",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-intl-idn",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-intl-messageformatter",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-intl-normalizer",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-mbstring",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-php72",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-php73",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-php74",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-php80",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-php81",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-util",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-uuid",
"binary_version": "1.24.0-1ubuntu2"
},
{
"binary_name": "php-symfony-polyfill-xml",
"binary_version": "1.24.0-1ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "php-symfony-polyfill",
"purl": "pkg:deb/ubuntu/php-symfony-polyfill@1.24.0-1ubuntu2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.22.1-1",
"1.23.1-1",
"1.24.0-1ubuntu1",
"1.24.0-1ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "php-symfony-polyfill",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-apcu",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-ctype",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-iconv",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-intl-grapheme",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-intl-icu",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-intl-idn",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-intl-messageformatter",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-intl-normalizer",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-mbstring",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-php72",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-php73",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-php74",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-php80",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-php81",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-php82",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-php83",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-util",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-uuid",
"binary_version": "1.28.0-1"
},
{
"binary_name": "php-symfony-polyfill-xml",
"binary_version": "1.28.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "php-symfony-polyfill",
"purl": "pkg:deb/ubuntu/php-symfony-polyfill@1.28.0-1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.27.0-2",
"1.28.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "php-symfony-polyfill",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-apcu",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-ctype",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-iconv",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-grapheme",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-icu",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-idn",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-messageformatter",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-normalizer",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-mbstring",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php72",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php73",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php74",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php80",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php81",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php82",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php83",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php84",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-util",
"binary_version": "1.31.0-5ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-uuid",
"binary_version": "1.31.0-5ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "php-symfony-polyfill",
"purl": "pkg:deb/ubuntu/php-symfony-polyfill@1.31.0-5ubuntu1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.31.0-4ubuntu1",
"1.31.0-5ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "php-symfony-polyfill",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-apcu",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-ctype",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-iconv",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-grapheme",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-icu",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-idn",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-messageformatter",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-intl-normalizer",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-mbstring",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php73",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php74",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php80",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php81",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php82",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php83",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php84",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-php85",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-util",
"binary_version": "1.33.0-6ubuntu1"
},
{
"binary_name": "php-symfony-polyfill-uuid",
"binary_version": "1.33.0-6ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "php-symfony-polyfill",
"purl": "pkg:deb/ubuntu/php-symfony-polyfill@1.33.0-6ubuntu1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.31.0-5ubuntu1",
"1.33.0-4ubuntu1",
"1.33.0-5ubuntu1",
"1.33.0-6ubuntu1"
]
}
],
"aliases": [],
"details": "Symfony Polyfill backports PHP features and provides compatibility layers for extensions and functions. From 1.17.1 until 1.38.1, symfony/polyfill-intl-idn accepts xn-- labels whose Punycode payload is empty or decodes to ASCII-only code points because Idn::process() does not enforce the UTS #46 revision 33 requirement that decoded ACE labels contain at least one non-ASCII code point. Originally unequal domain names can be regarded as equal, which can lead to blacklist bypassing, inconsistent URL parsing, and server-side request forgery in applications using the polyfill to canonicalise or compare hostnames. This issue is fixed in version 1.38.1.",
"id": "UBUNTU-CVE-2026-46644",
"modified": "2026-07-15T17:52:44Z",
"published": "2026-07-14T21:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-46644"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46644"
},
{
"type": "REPORT",
"url": "https://symfony.com/blog/cve-2026-46644-insecure-equivalence-in-symfony-polyfill-intl-idn-for-ascii-only-xn-labels"
},
{
"type": "REPORT",
"url": "https://github.com/symfony/polyfill/security/advisories/GHSA-2xf4-cg6j-vhgq"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-46644"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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