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CVE-2026-48736

Symfony: IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-compatible): SSRF Bypass in NoPrivateNetworkHttpClient PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
symfony / symfonyaffected >= 5.4.0, < 5.4.53; affected >= 6.0.0-BETA1, < 6.4.41; affected >= 7.0.0-BETA1, < 7.4.13; affected >= 8.0.0-BETA1, < 8.0.13
symfony / http-clientaffected >= 5.4.0, < 5.4.53
symfony / http-foundationaffected >= 6.0.0-BETA1, < 6.4.41; affected >= 7.0.0-BETA1, < 7.4.13; affected >= 8.0.0-BETA1, < 8.0.13

CWE

CWE-184, CWE-918

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.