Ghostwire

CVE-2026-46644: symfony/polyfill-intl-idn: xn-- labels with ASCII-only Punycode payloads are treated as equivalent to their decoded form

LOW CVSS 2.5 Exploit Available 4 PoC

Published: May 28, 2026 | Last Modified: May 28, 2026

Description

symfony/polyfill-intl-idn: xn-- labels with ASCII-only Punycode payloads are treated as equivalent to their decoded form

Ghostwire Analysis — What This Means Practically

4 proof-of-concept exploits available on GitHub. Public exploit code lowers the barrier for both researchers and attackers.

This analysis is generated by Ghostwire from NVD, CISA KEV, EPSS, and open-source intelligence data. Verify findings through primary sources before acting.

Proof-of-Concept Exploits (4)

symfony/polyfill
symfony/polyfill
FriendsOfPHP/security-advisories
FriendsOfPHP/security-advisories

References

github.com/symfony/polyfill/security/advisories/GHSA-2xf4-cg6j-vhgq
github.com/symfony/polyfill/commit/1be936e2491ccebe152bd736dfc91eb1422c8bec
github.com/FriendsOfPHP/security-advisories/blob/master/symfony/polyfill-intl-id
github.com/FriendsOfPHP/security-advisories/blob/master/symfony/polyfill/CVE-202
symfony.com/cve-2026-46644
github.com/advisories/GHSA-2xf4-cg6j-vhgq
www.tenable.com/cve/CVE-2026-46644
www.cnnvd.org.cn/home/globalSearch?keyword=CVE-2026-46644