SB2026032459 - Multiple vulnerabilities in Ruby on Rails
Published: March 24, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 10 secuirty vulnerabilities.
1) Cross-site scripting (CVE-ID: CVE-2026-33167)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in Action Pack debug exceptions. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
2) Improper Neutralization of Special Elements in Output Used by a Downstream Component (CVE-ID: CVE-2026-33202)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to the glob injection in Active Storage DiskService. A remote attacker can delete unintended files from the storage directory.
3) Path traversal (CVE-ID: CVE-2026-33195)
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in Active Storage DiskService. A remote attacker can send a specially crafted HTTP request and read, write or delete arbitrary files on the system.
4) Input validation error (CVE-ID: CVE-2026-33658)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in Active Storage proxy mode. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
5) Resource exhaustion (CVE-ID: CVE-2026-33176)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources in Active Support number helpers. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
6) Uncontrolled Memory Allocation (CVE-ID: CVE-2026-33174)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to ucontrolled memory allocation in Active Storage proxy mode. A remote attacker can cause a denial of service (DoS) condition on the target system.
7) Expired pointer dereference (CVE-ID: CVE-2026-33173)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to DirectUploadsController accepts arbitrary metadata from the client and persists it on the blob. A remote attacker can gain access to sensitive information on the target system.
8) Cross-site scripting (CVE-ID: CVE-2026-33170)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within SafeBuffer#% in Active Support. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
9) Incorrect Regular Expression (CVE-ID: CVE-2026-33169)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation when processing regular expressions within number_to_delimited in Active Support. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.
10) Cross-site scripting (CVE-ID: CVE-2026-33168)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in Action View tag helpers. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install update from vendor's website.
References
- https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6
- https://github.com/rails/rails/security/advisories/GHSA-73f9-jhhh-hr5m
- https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87
- https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
- https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9
- https://github.com/rails/rails/security/advisories/GHSA-r46p-8f7g-vvvg
- https://github.com/rails/rails/security/advisories/GHSA-qcfx-2mfw-w4cg
- https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
- https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
- https://github.com/rails/rails/security/advisories/GHSA-v55j-83pf-r9cq