php-symfony-polyfill: Symfony Polyfill backports PHP features and provides compatibility layers for extensions and functions
CVE-2026-46644 is fixed in php-symfony-polyfill on 1 platform by DEBIAN-CVE-2026-46644 (version 1.38.1-1), released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| php-symfony-polyfill · Debian 14 | 1.38.1-1 | DEBIAN-CVE-2026-46644 | Jun 24, 2026 |
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