CVE-2026-48736

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.

CVSS v3 8.6 HIGH

8.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/symfony/symfony/commit/82765368cf74177c36613575182f168a2eb765b2	Patch
https://github.com/symfony/symfony/commit/85b831555be8ea1f43bf01078afe87bc4c92f65e	Patch
https://github.com/symfony/symfony/releases/tag/v5.4.53	Release Notes
https://github.com/symfony/symfony/releases/tag/v6.4.41	Release Notes
https://github.com/symfony/symfony/releases/tag/v7.4.13	Release Notes
https://github.com/symfony/symfony/security/advisories/GHSA-38cx-cq6f-5755	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::
	cpe:2.3:a:sensiolabs:symfony::::::::

History

No history.

Information

Published : 2026-07-14 20:17

Updated : 2026-07-16 03:12

NVD link : CVE-2026-48736

Mitre link : CVE-2026-48736

CVE.ORG link : CVE-2026-48736

JSON object : View

Products Affected

sensiolabs

symfony

CWE

CWE-184

Incomplete List of Disallowed Inputs

CWE-918

Server-Side Request Forgery (SSRF)

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