SEPTEMBER 12, 2026
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Case File

CVE-2026-48736

HIGH · CVSS 8.6 EPSS 0.46% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-14 · Last synced 2026-08-13

CyberRota Analysis

AI-Generated

The Symfony PHP framework versions 5.4.0 to 5.4.53, 6.4.41, 7.4.13, and 8.0.13 are vulnerable due to the omission of certain IPv6 transition prefixes in the NoPrivateNetworkHttpClient and IpUtils::PRIVATE_SUBNETS, which allows attackers to exploit URLs that should be blocked as private IPv4 targets. This vulnerability poses a high risk, enabling potential unauthorized access to private networks. Organizations using affected Symfony versions should prioritize updating to the patched versions to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-48736
Severity
HIGH
CVSS
8.6
EPSS
0.46%

Original NVD 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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