CVE catalog

CVE-2026-46644

Severity: Medium · CVSS 6.9
Published: Jul 14, 2026, 9:16:55 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.54% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	php-symfony-polyfill	sid	`1.43.2-2`	fixed
Debian	php-symfony-polyfill	forky	`1.43.2-2`	fixed
Debian	php-symfony-polyfill	bookworm	`1.27.0-2`	vulnerable
Cpe	php-symfony-polyfill	Not reported	Not reported	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	php-symfony-polyfill	source	sid	`1.38.1-1`	not yet assigned	Not reported	Not reported
Debian	php-symfony-polyfill	source	forky	`1.38.1-1`	not yet assigned	Not reported	Not reported
Debian	php-symfony-polyfill	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

Notes

[bookworm] php-symfony-polyfill: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[php-symfony-polyfill]Affected
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-apcu]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-ctype]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-iconv]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-intl-grapheme]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-intl-icu]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-intl-idn]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-intl-messageformatter]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-intl-normalizer]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-mbstring]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-php72]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-php73]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-php74]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-php80]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-php81]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-php82]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-php83]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-util]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-uuid]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
[php-symfony-polyfill-xml]Affected
Source package: [php-symfony-polyfill]
Details (2)
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12
- 1.27.0-2 · all · bookworm
  Affected
  nvd · php-symfony-polyfill · debian · bookworm; nvd · php-symfony-polyfill · debian · 12

Observed: Oct 23, 2026, 9:44:16 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]