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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-48736

35
FAUCET Score

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.

First published: Jul 14, 2026Last modified: Jul 14, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.4.0, < 5.4.43CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 6.4.0, < 6.4.41CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.4.13CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 8.0.0, < 8.0.13CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
HIGH
SS Integrity
LOW
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 16th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

composerpatch availablevia ghsa
Product: symfony/http-clientFixed in: 5.4.53
composerpatch availablevia ghsa
Product: symfony/http-foundationFixed in: 6.4.41
composerpatch availablevia ghsa
Product: symfony/http-foundationFixed in: 7.4.13
composerpatch availablevia ghsa
Product: symfony/http-foundationFixed in: 8.0.13
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 5.4.53
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 6.4.41
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 7.4.13
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 8.0.13

Vendor Advisories (1)

composerGHSA-38cx-cq6f-5755medium

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

Jun 15, 2026

References

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