Security Advisory

CVE-2026-48736

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-14 19:09:30

Last updated 2026-07-15 13:23:06

Assigner GitHub_M

CVSS score 6.9

State PUBLISHED

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.0 to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, NoPrivateNetworkHttpClient and IpUtils::PRIVATE_SUBNETS omitted IPv6 transition prefixes such as 6to4, NAT64, Teredo, and IPv4-compatible IPv6, allowing attacker-supplied URLs to represent private IPv4 targets in forms that IpUtils::isPrivateIp() did not block. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

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