SB2026060135 - Multiple vulnerabilities in Symfony

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026060135

SB2026060135 - Multiple vulnerabilities in Symfony

Published: June 1, 2026

Security Bulletin ID SB2026060135
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Incorrect authorization (CVE-ID: CVE-2026-48489)

CWE-ID: CWE-863 - Incorrect Authorization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to incorrect authorization checks when failure_forward is enabled. A remote attacker can manipulate the _failure_path parameter and gain access to sensitive information on the system.


2) Open redirect (CVE-ID: CVE-2026-48784)

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper encoding of chained dot-segments. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.


3) Spoofing attack (CVE-ID: CVE-2026-48760)

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in the HtmlSanitizer URL parser. A remote attacker can spoof page content.


4) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2026-48747)

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper verification of a cryptographic signature in the Mailomat webhook parser. A remote attacker can specify the HMAC algorithm and downgrade the cryptographic protection on the system.


5) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2026-48736)

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in NoPrivateNetworkHttpClient. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.


Remediation

Install update from vendor's website.

References