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Incomplete Blacklist Affecting symfony package, versions <7.4.13+dfsg-1

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.57% (45th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-SYMFONY-17090962
  • published29 May 2026
  • disclosed14 Jul 2026
Report a new vulnerability Found a mistake?

Introduced: 29 May 2026

CVE-2026-48736  (opens in a new tab)
CWE-184  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Debian:unstable symfony to version 7.4.13+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream symfony package and not the symfony package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.