[MEDIUM] CVE-2026-48736: IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-compatible): SSRF Bypass in NoPrivateNetworkHttpClient

PKSA-bd71-n14y-wh1d CVE-2026-48736 GHSA-38cx-cq6f-5755

Affected package: symfony/symfony

Affected version: >=5.4.0,<5.4.53|>=6.4.0,<6.4.41|>=7.0.0,<7.1.0|>=7.1.0,<7.2.0|>=7.2.0,<7.3.0|>=7.3.0,<7.4.0|>=7.4.0,<7.4.13|>=8.0.0,<8.0.13

Reported by:
GitHub, FriendsOfPHP/security-advisories