symfony: Symfony is a PHP framework for web and console applications and a set of reusable PHP components
CVE-2026-48736 is fixed in symfony on 1 platform, first by DEBIAN-CVE-2026-48736, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| symfony · Debian 12.15 (bookworm) | 5.4.53+dfsg-0+deb12u1 | DEBIAN-CVE-2026-48736 | Jun 24, 2026 |
| symfony · Debian 13.5 (trixie) | 6.4.41+dfsg-0+deb13u1 | DEBIAN-CVE-2026-48736 | Jun 24, 2026 |
| symfony · Debian 14 | 7.4.13+dfsg-1 | DEBIAN-CVE-2026-48736 | Jun 24, 2026 |
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