Apache Syncope patches SQL injections, Groovy sandbox escape, and JWT token exposure (CVE-2026-77051, CVE-2026-82232, CVE-2026-77147, CVE-2026-73178)

Apache Syncope, an open-source identity management (IdM) server, exposes sensitive information to an unauthorized actor through its REST API: an administrator with adequate entitlements can retrieve the list of all existing access tokens, including their signed JWT bodies. By replaying one of these stolen JWTs, that administrator can issue further REST requests while impersonating users who hold higher administration entitlements, effectively escalating to full administrative control of the identity deployment. The flaw affects Syncope 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2, and is fixed in 4.0.8 and 4.1.3. No CVSS score has been assigned yet, no public proof-of-concept is known, and there is no evidence of exploitation in the wild.

Do: Upgrade to Apache Syncope 4.0.8 or 4.1.3 as soon as possible — the 3.0.x line has no fixed release, so 3.0.16 users must migrate to a patched 4.x version. After upgrading, revoke and reissue all access tokens and review REST audit logs for any administrative enumeration of the token list or anomalous authenticated requests. Until patched, restrict the entitlements that permit listing access tokens via REST.

CVE-2026-77051 is an SQL injection vulnerability (CWE-89) in Apache Syncope, an open-source identity management platform, affecting the Audit Events search feature. An authenticated administrator with adequate entitlements can inject arbitrary SQL via stacked queries by passing unsanitized entityKey and opEvent parameters, potentially reading, modifying, or destroying data in the backing database depending on the database account's privileges. Affected versions are 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2; the issue is fixed in 4.0.8 and 4.1.3 (users on the 3.0.x line have no patched 3.0 release and must upgrade). Exploitation requires administrative access, which limits the attacker pool to privileged insiders or attackers who have already compromised an admin account. No public proof-of-concept or in-the-wild exploitation is currently known, and the CVE is not in the CISA KEV catalog.

Do: Upgrade immediately to Apache Syncope 4.0.8 or 4.1.3; note there is no fixed 3.0.x release, so 3.0.x deployments must move to a patched 4.x line. If immediate upgrade is not possible, restrict access to the Syncope admin console to trusted networks and VPN, enforce least-privilege on the database account Syncope uses, and review audit logs and database query history for anomalous entityKey or opEvent values containing SQL syntax indicating exploitation attempts.

Apache Syncope contains a code injection vulnerability (CWE-94) in which an administrator holding entitlements over Implementations can define a malicious Groovy Command class whose CommandArgs static implementation contains untrusted code, bypassing the Groovy security sandbox. Successful exploitation executes arbitrary code on the Syncope server with the privileges of the application, giving the attacker full read and write access to managed identity data and potentially broader host compromise. The flaw requires high privileges (a Syncope administrator, not an end user), which limits the attack surface to insider threats, compromised admin accounts, or environments where Implementation rights are delegated too broadly. All Syncope 3.0.0-M0–3.0.16, 4.0.0-M0–4.0.7, and 4.1.0-M0–4.1.2 deployments are affected; there is no evidence of in-the-wild exploitation and no public proof of concept is known.

Do: Upgrade to Apache Syncope 4.0.8 or 4.1.3 immediately; since the 3.0.x line has no listed fix, 3.0.16 and earlier deployments should migrate to 4.0.8+ or 4.1.3+. In the interim, restrict the 'Implementations' entitlement to a minimal set of fully trusted administrators and audit existing Groovy Command and CommandArgs implementations for unexpected or recently added code. Review Syncope admin and audit logs for suspicious Implementation creation events, especially if admin credentials are shared or delegated to multiple operators.