Apache Syncope Patches 12 CVEs Including Groovy Sandbox Bypass RCE and Audit Search SQLi

Apache Syncope Patches 12 CVEs Including Groovy Sandbox (TL-2026-1666), also tracked as Apache Syncope Groovy Sandbox Bypass RCE, is a critical-severity software vulnerability scored CVSS 7.2, first published 2026-07-24. It has no confirmed attribution, affects Apache Software Foundation Apache Syncope, references 12 CVEs (CVE-2026-63071, CVE-2026-57308, CVE-2026-62183), maps to 21 MITRE ATT&CK techniques (T1059, T1068, T1070), and is covered by 9 detection rules and 26 indicators of compromise.

Key facts for TL-2026-1666

Threat ID
TL-2026-1666
Also known as
Apache Syncope Groovy Sandbox Bypass RCE, Apache Syncope July 2026 Multi-CVE Disclosure
Severity
CRITICAL
CVSS
7.2 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
Status
ACTIVE
Category
VULNERABILITY
First published
2026-07-24
Last reviewed
2026-07-24
Attribution confidence
LOW
Motivation
UNKNOWN
Target sectors
government administration, finance, health, technology, education, enterprise-it
Target regions
Global
Detection rules
9
Indicators of compromise
26

Apache Syncope released fixes for 12 CVEs across the 3.0, 4.0, and 4.1 branches, including three distinct Groovy-sandbox-bypass RCEs (CVE-2026-63071, CVE-2026-53421, CVE-2026-53405), a SQL injection in audit search via unvalidated sort parameters (CVE-2026-57308), and a self-service privilege escalation allowing users to grant themselves administrative roles (CVE-2026-62183). No active exploitation was reported; Apache recommends prompt upgrading to 4.1.2, 4.0.7, or 3.0.16 as applicable.

How Apache Syncope Patches 12 CVEs Including Groovy Sandbox works

On 2026-07-20, the Apache Syncope Project Management Committee, led by Francesco Chicchiriccò, disclosed a batch of security advisories covering 12 CVEs discovered and patched across the actively maintained 3.0.x, 4.0.x, and 4.1.x release lines of Apache Syncope, an open-source Identity and Access Management (IAM) / Identity Governance and Administration (IGA) platform used to provision, synchronize, and manage user identities across enterprise systems. The disclosure batches into three risk clusters.

The highest-impact cluster is a family of THREE independent Groovy-sandbox-bypass remote-code-execution flaws, each in a different subsystem that lets a Syncope administrator supply custom Groovy logic: CVE-2026-63071 (general Implementation/COMMAND upload path), CVE-2026-53421 (scripted Connector subsystem, used for provisioning integrations to external resources), and CVE-2026-53405 (Flowable BPMN workflow engine ScriptTask nodes imported as process definitions). All three share the same root cause pattern seen in the earlier, related CVE-2025-57738 (patched April 2026): Syncope allows administrators to extend platform behavior by uploading Groovy source that is compiled at runtime via a GroovyClassLoader, and — prior to these patches — that compiled code ran with unrestricted access to the full JVM API surface (Runtime.exec, ProcessBuilder, File I/O, Socket, reflection), rather than inside Syncope's intended Groovy sandbox (built on Jenkins Script Security's SecureASTCustomizer). Because static initializer blocks in the uploaded Groovy class execute during the compile/parse phase itself — before any interface or sandbox validation occurs — the sandbox could be bypassed entirely, giving an authenticated administrator (or an actor who compromises/social-engineers an admin session) full remote code execution as the Syncope process user. Public technical writeups and a released PoC for the related CVE-2025-57738 predecessor bug demonstrated this exact primitive achieving uid=0(root) via `POST /syncope/rest/implementations/COMMAND/{key}`.

The second cluster is a set of authorization and injection flaws: CVE-2026-62183 (User Self-Service Privilege Escalation, CWE-269/CWE-862 class) allows any authenticated Syncope user, via the self-service role-request workflow, to grant themselves one or more administratively-defined Roles without approval — collapsing the privilege boundary between standard users and administrators. CVE-2026-57308 (SQL Injection in Audit Events search, CWE-89) allows an administrator to achieve execution of arbitrary SQL via stacked queries by supplying unsanitized `sort` parameters to the audit-search REST endpoint. CVE-2026-62418 (SSRF in Connectors and Resources Check) lets a low-privileged authenticated user trigger server-side requests against the resource-validation subsystem, potentially reaching internal-only network segments or cloud metadata endpoints. CVE-2026-42797 (Information Disclosure via JEXL, CWE-202) allows an administrator with only Derived Schema entitlements to author a malicious JEXL expression that lets other administrators (who have User-read but not full User entitlements) access security-sensitive User attribute data they should not be able to see.

The third, lower-severity cluster covers legacy-branch (3.0.x/4.0.x pre-4.0.4) issues fixed earlier in the same disclosure round: CVE-2026-42782 (post-auth Groovy sandbox bypass RCE, predecessor of the 63071/53421/53405 family, fixed in 4.1.1/4.0.6), CVE-2026-23795 (XXE in the Syncope Console allowing an administrator to construct malicious XML and exfiltrate sensitive data, CWE-611), and CVE-2026-23794 (Reflected XSS on the Enduser Login page, CWE-79, enabling credential/session-token theft via a crafted login link and account takeover).

No CVE in this batch has been added to the CISA KEV catalog and no in-the-wild exploitation has been confirmed as of 2026-07-24. All patched CVEs require some level of authentication (most require administrative entitlements), which meaningfully limits the unauthenticated attack surface but does not eliminate risk in multi-tenant or delegated-administration Syncope deployments, or in environments where an attacker has already obtained low-privileged credentials via phishing, credential stuffing, or a separate initial-access vector. Given Syncope's role as an IAM/IGA control plane — where compromise cascades into every downstream system it provisions and synchronizes identities for — and the breadth of affected branches (3.0, 4.0, and 4.1 all affected by the core RCE cluster), this disclosure meets the supply-chain/software-breadth criterion for priority patching even absent confirmed active exploitation.

MITRE ATT&CK techniques used in TL-2026-1666

Execution

T1059 Command and Scripting Interpreter; T1203 Exploitation for Client Execution; T1648 Serverless Execution

Privilege Escalation

T1068 Exploitation for Privilege Escalation; T1078 Valid Accounts; T1548 Abuse Elevation Control Mechanism

Defense Evasion

T1070 Indicator Removal; T1140 Deobfuscate/Decode Files or Information; T1211 Exploitation for Stealth

Command and Control

T1071 Application Layer Protocol

Initial Access

T1078 Valid Accounts; T1190 Exploit Public-Facing Application

Discovery

T1082 System Information Discovery; T1580 Cloud Infrastructure Discovery

Persistence

T1098 Account Manipulation; T1505 Server Software Component

Collection

T1119 Automated Collection; T1213 Data from Information Repositories

Credential Access

T1212 Exploitation for Credential Access; T1539 Steal Web Session Cookie

Impact

T1565 Data Manipulation

Exfiltration

T1567 Exfiltration Over Web Service

Affected products and versions in Apache Syncope Patches 12 CVEs Including Groovy Sandbox

  • Apache Software Foundation — Apache Syncope
    Vulnerable versions: 3.0.0-M0 through 3.0.16; 4.0.0-M0 through 4.0.6; 4.1.0-M0 through 4.1.1; 2.1.x through 2.1.14 (CVE-2025-65998, CVE-2025-57738 only)
    Fixed in: 4.1.2; 4.0.7; 4.1.1 (partial — CVE-2026-42797/CVE-2026-42782 only); 4.0.6 (partial — CVE-2026-42797/CVE-2026-42782 only); 4.0.4 / 3.0.16 (partial — CVE-2026-23795/CVE-2026-23794 only); 4.0.3 / 3.0.15 (partial — CVE-2025-65998 only); 4.0.2 / 3.0.14 (partial — CVE-2025-57738 only)

Remediation for Apache Syncope Patches 12 CVEs Including Groovy Sandbox

Patches

  • 4.1.2 — fixes CVE-2026-63071, CVE-2026-62418, CVE-2026-62183, CVE-2026-57308, CVE-2026-53421, CVE-2026-53405
  • 4.0.7 — fixes CVE-2026-63071, CVE-2026-62418, CVE-2026-62183, CVE-2026-57308, CVE-2026-53421, CVE-2026-53405
  • 4.1.1 — fixes CVE-2026-42797, CVE-2026-42782
  • 4.0.6 — fixes CVE-2026-42797, CVE-2026-42782
  • 4.0.4 / 3.0.16 — fixes CVE-2026-23795, CVE-2026-23794
  • 4.0.3 / 3.0.15 — fixes CVE-2025-65998 (hard-coded AES key)
  • 4.0.2 / 3.0.14 — fixes CVE-2025-57738 (predecessor Groovy sandbox RCE)

Immediate actions

  • Upgrade Apache Syncope to 4.1.2 (from any 4.1.0-M0–4.1.1), 4.0.7 (from any 4.0.0-M0–4.0.6), or 3.0.16 (from any 3.0.0-M0–3.0.15) depending on branch
  • For deployments still on pre-4.0.4/3.0.16 patch levels, upgrade at minimum to 4.0.4/3.0.16 to also close CVE-2026-23795 (XXE) and CVE-2026-23794 (reflected XSS)
  • Audit administrator accounts and Implementation/Connector/BPMN-import entitlements — restrict Groovy-authoring capability (Implementations, Connectors, Workflow Definition import) to the minimum set of trusted administrators
  • Review Syncope audit logs for anomalous Implementation COMMAND uploads, Connector script edits, or BPMN process-definition imports predating the patch
  • Rotate credentials for any administrative accounts suspected of compromise and review self-service Role-request approval logs for unauthorized role grants tied to CVE-2026-62183

Workarounds

  • If immediate upgrade is not possible, restrict the Implementations, Connectors, and Workflow Definition (BPMN import) admin console pages/REST endpoints to a minimal trusted-admin allowlist via reverse-proxy ACLs
  • Disable or tightly restrict the self-service Role-request feature until upgraded to close CVE-2026-62183

Longer-term hardening

  • Deploy EDR/host-based monitoring on Syncope application servers capable of detecting anomalous child-process spawning from the JVM (Runtime.exec/ProcessBuilder chains)
  • Segment the Syncope IAM control plane on its own network zone with egress filtering to reduce SSRF (CVE-2026-62418) blast radius toward internal/cloud-metadata endpoints
  • Implement approval workflows for all self-service Role requests rather than relying solely on platform-enforced authorization boundaries
  • Add WAF/reverse-proxy input validation on Syncope REST API sort/query parameters as defense-in-depth against injection classes like CVE-2026-57308

CVEs associated with Apache Syncope Patches 12 CVEs Including Groovy Sandbox

CVE-2026-63071, CVE-2026-57308, CVE-2026-62183, CVE-2026-62418, CVE-2026-53421, CVE-2026-53405, CVE-2026-42797, CVE-2026-42782, CVE-2026-23795, CVE-2026-23794, CVE-2025-65998, CVE-2025-57738

Weaknesses (CWE) in Apache Syncope Patches 12 CVEs Including Groovy Sandbox

CWE-693, CWE-284, CWE-269, CWE-862, CWE-89, CWE-918, CWE-202, CWE-611, CWE-79, CWE-798

Timeline of Apache Syncope Patches 12 CVEs Including Groovy Sandbox

  • Apache Syncope 3.0.16 and 4.0.4 released, patching CVE-2026-23795 (Console XXE) and CVE-2026-23794 (Enduser Login reflected XSS).
  • Apache Syncope 3.0.14 and 4.0.2 released, patching CVE-2025-57738 — the first disclosed Groovy sandbox bypass RCE in the ImplementationManager, root cause of the July 2026 RCE cluster.
  • SecureLayer7 researcher yosef0x01 publishes technical writeup and PoC for CVE-2025-57738 demonstrating full root-level RCE via the Implementations COMMAND REST endpoint.
  • Apache Syncope 4.0.6 and 4.1.1 released, patching CVE-2026-42797 (JEXL information disclosure) and CVE-2026-42782 (post-auth Groovy sandbox bypass RCE, predecessor of the 63071/53421/53405 family).
  • Researchers follycat and Y0n3er credited with discovering CVE-2026-53405 (Flowable BPMN Groovy ScriptTask RCE).
  • Apache Syncope PMC (Francesco Chicchiriccò) publishes six new CVE advisories to the oss-security mailing list — CVE-2026-63071, CVE-2026-62418, CVE-2026-62183, CVE-2026-57308, CVE-2026-53421, and CVE-2026-53405 — alongside release of patched versions 4.1.2 and 4.0.7.
  • As of this report, no in-the-wild exploitation of the July 2026 Syncope CVE batch has been confirmed and none of the 12 CVEs appear in the CISA Known Exploited Vulnerabilities catalog.
  • Cyber Security News publishes consolidated coverage summarizing all 12 CVEs across the Syncope 3.0/4.0/4.1 branches, prompting upgrade guidance to defenders.

Sources cited for Apache Syncope Patches 12 CVEs Including Groovy Sandbox

Threats related to Apache Syncope Patches 12 CVEs Including Groovy Sandbox

Detection coverage for TL-2026-1666

As of 2026-07-24, Threadlinqs Intelligence publishes 9 detection rule(s) for TL-2026-1666 across Splunk SPL, Microsoft KQL and Sigma, covering 26 indicator(s) of compromise. The whole corpus is readable without an account; a free account unlocks full detection query text in Splunk SPL, Microsoft KQL and Sigma; paid tiers add raw indicator values, correlation and the MCP server. Threadlinqs MCP server · View plans.

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