Is CVE-2026-48736 actively exploited?

No active exploitation of CVE-2026-48736 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-48736 be exploited remotely?

Yes. CVE-2026-48736 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-48736?

CVE-2026-48736 has a CVSS score of 8.6 (HIGH).

HOME VULNERABILITIESCVE-2026-48736

HIGH

CVE-2026-48736

CWE-184Published: July 14, 2026· Updated: Jul 16, 2026

8.6

CVSS v3.1

EPSS:0.46%probability of exploitation in 30 daysPercentile:36.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-48736 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 8.6.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.