CVE-2026-48784

What it is

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, UrlGenerator::doGenerate() used strtr() dot-segment encoding that skipped every other chained ../ or ./ segment, allowing attacker-controlled route parameters to generate URLs that collapse to a different path under RFC 3986 normalization. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-07-14 20:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-15 14:44 UTC Last updatedMost recent change to the record

Details

Published

2026-07-14 20:17 UTC

Last modified

2026-07-15 14:44 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-172

Record status

Analyzed

Affected

• Sensiolabs Symfony < 5.4.53
• Sensiolabs Symfony < 6.4.41
• Sensiolabs Symfony < 7.4.13
• Sensiolabs Symfony < 8.0.13

Attack profile CVSS 4.0 · 5.1

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

Active

Confidentiality

None

Integrity

None

Availability

None