Apache Syncope Patches Critical RCE and SQL Injection Vulnerabilities

Key Takeaways

• Apache has released crucial security updates for its Syncope identity and access management (IAM) platform.
• Multiple critical vulnerabilities, including remote code execution (RCE) and SQL injection, affect Syncope versions across the 3.0, 4.0, and 4.1 branches.
• The vulnerabilities permit attackers with varying privilege levels to execute arbitrary code, escalate privileges, and access sensitive data.
• Users must upgrade to patched versions (4.1.2, 4.0.7, 4.1.1, 4.0.6, 4.0.4, 3.0.16, 4.0.3, and 3.0.15) or rebuild from source to secure their installations.

Apache has rolled out urgent security patches for its Syncope identity and access management (IAM) platform. These updates address a range of serious vulnerabilities, including critical remote code execution (RCE), SQL injection, privilege escalation, server-side request forgery (SSRF), and information disclosure flaws.

The vulnerabilities impact several iterations of Syncope, necessitating immediate upgrades to the most recent secure releases for all administrators. The patches are primarily integrated into versions 4.1.2, 4.0.7, 4.1.1, 4.0.6, 4.0.4, 3.0.16, 4.0.3, and 3.0.15. These releases collectively resolve a series of recently identified Common Vulnerabilities and Exposures (CVEs) across the core, console, and end-user components of the platform.

Apache’s detailed release notes specify how these security weaknesses affect the 3.0, 4.0, and 4.1 branches of Syncope, with risks extending from early development builds to the latest stable versions. Since Apache does not provide binary hotfixes, users must either upgrade to the patched versions or recompile their installations from the updated source code to maintain security and support.

Critical Vulnerabilities Addressed

Remote Code Execution (RCE)

One of the most severe vulnerabilities involves RCE, which can be exploited through Syncope’s Groovy integration and scriptable connectors. Attackers possessing sufficient privileges could exploit Groovy classes or BPMN Groovy ScriptTasks (CVE-2026-63071, CVE-2026-53405) to bypass existing security mechanisms, enabling direct execution of untrusted code on the server. Furthermore, the misuse of scripted REST and SQL connectors (CVE-2026-53421) could allow privileged users to execute arbitrary Groovy logic, leading to post-authentication RCE. Another RCE vulnerability (CVE-2026-42782) also affects Groovy sandbox bypass scenarios post-authentication. An older RCE (CVE-2025-57738) related to Groovy implementation was also addressed.

SQL Injection

A critical SQL injection vulnerability, identified as CVE-2026-57308, exists within the Audit Events search functionality. This flaw allows authenticated administrators to supply unsanitized sort parameters, leading to the execution of unauthorized SQL queries against the underlying database. This issue affects versions ranging from 3.0.0-M0 to 3.0.16 and 4.0.0-M0 to 4.0.6, with fixes implemented in versions 4.0.7 and 4.1.2.

Privilege Escalation

A privilege escalation flaw (CVE-2026-62183) has been identified in self-service workflows. This vulnerability enables users to assign themselves roles without requiring proper administrative approval, effectively granting them elevated access. This issue impacts the same version ranges as the SQL injection vulnerability and is resolved in the corresponding updates.

Other Significant Flaws

• Server-Side Request Forgery (SSRF): Apache also resolved a low-privilege authenticated SSRF vulnerability (CVE-2026-62418), which could allow specially crafted requests to initiate arbitrary outbound HTTP calls.
• Information Disclosure: Advisories address information disclosure bugs (CVE-2026-42797) that could expose sensitive user fields during data retrieval, particularly through JEXL expressions.
• Web Interface Vulnerabilities: Issues such as XML External Entity (XXE) attacks (CVE-2026-23795) and cross-site scripting (XSS) problems (CVE-2026-23794, CVE-2024-45031, CVE-2024-38503) were also patched. These could lead to credential theft and session hijacking.
• Cryptographic Weakness: An older flaw, CVE-2025-65998, concerning a hardcoded AES key used for password encryption, was also highlighted in Syncope’s security advisories. This could allow attackers with database access to decrypt stored passwords.

The updates also remediate previous RCE vulnerabilities linked to Groovy and server-side template injection in mail templates.

What You Should Do

• Immediate Upgrade: All administrators are strongly advised to upgrade their Apache Syncope installations to the latest secure versions, specifically 4.1.2 and 4.0.7, to mitigate the most critical vulnerabilities. Other patched versions include 4.1.1, 4.0.6, 4.0.4, 3.0.16, 4.0.3, and 3.0.15.
• Rebuild from Source: If direct upgrades are not feasible, rebuild installations from the updated source code.
• Review Access Controls: Rigorously review user roles and entitlements, particularly within workflows and self-service functionalities, to ensure appropriate security measures and access controls are enforced.
• Stay Informed: Regularly consult Syncope’s security advisories for the latest information on vulnerabilities and patches.

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