CVE-2026-73579
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk40th percentile - higher than 40% of all known CVEs
Summary
Apache Syncope has an incorrect authorization vulnerability. Search requests are transformed into SQL, Neo4J or Elasticsearch/Opensearch queries, and the Realms filter that should restrict results to the requester's permissions may be rendered as empty for non-recursive search requests, voiding privilege restrictions.
Risk Assessment
An unauthorized user may access search results outside their permission scope. This can lead to data leakage and breach of Realm isolation.
Recommendation
Upgrade Apache Syncope to version 4.0.8 or 4.1.3. Verify search configuration and user entitlements after the upgrade.
Other vulnerabilities in Apache Syncope
See all- CVE-2026-73370Critical
An incorrect authorization vulnerability in Apache Syncope affects the Reconciliation service (pull and push). Due to incomplete delegated administration security checks, calls by administrators lacking proper entitlements may be accepted, enabling unauthorized actions.
- CVE-2026-78330Critical
An incorrect privilege assignment vulnerability in Apache Syncope. When the configured JWKS settings for internal JWT authentication are disclosed (at least protocol and key), an attacker can obtain admin privileges after completing successful authentication and obtaining a valid low-privileges JWT.
- CVE-2026-77181Critical
Apache Syncope has an incorrect authorization vulnerability. An administrator with ClientApp's update entitlement is unable to perform the related operation, while ClientApp's create entitlement is checked both for create and update operations on ClientApp.
- CVE-2026-77051Critical
Apache Syncope has an SQL Injection vulnerability due to improper neutralization of special elements in SQL commands. An administrator with adequate entitlements can achieve execution of arbitrary SQL via stacked queries, leveraging unsanitized entityKey and opEvent parameters.
- CVE-2026-75030Critical
Apache Syncope has a missing authorization vulnerability. An administrator with task execution entitlements might be able to mass (de)provision group members, regardless of their group-related administration capabilities.
- CVE-2026-73668Critical
Apache Syncope has an incorrect authorization vulnerability. An administrator with adequate entitlements in a given Realm may be able to read via REST the full Connector configuration, confidential properties included, scoped in another Realm and thus be able to effectively duplicate such Connector instance into the Realm they have administration rights for.
- CVE-2026-73470Critical
Apache Syncope has an improper privilege management vulnerability. Delegations can be created or updated with Roles not owned by the delegating User, or not for the same Realm subtree under which delegation management was granted.
- CVE-2026-87802Critical
Improper verification of cryptographic signature vulnerability in Apache Syncope. When SRA is configured for OAuth 2.0 without a JWKS set URI assigned, an attacker can forge arbitrary JWTs to impersonate any user identity and permissions, gaining full access to services proxied by SRA.
- CVE-2026-87785Critical
Authentication bypass by spoofing vulnerability in Apache Syncope. When the configured JWKS settings for internal JWT authentication are disclosed (at least protocol and key), an attacker can spoof another user's privileges after completing a successful authentication and obtaining a valid JWT.
- CVE-2026-86460Critical
Cypher injection vulnerability in the Neo4j persistence layer when processing some FIQL search conditions. This may allow manipulation of graph database queries.
Original NVD description (English source)
Incorrect Authorization vulnerability in Apache Syncope. Any search requests are transformed into SQL, Neo4J or Elasticsearch / Opensearch queries, depending on the actual deployment configuration. An important component of such transformation is the Realms filter, which ensures that the search results are matching the requester's permissions. For non-recursive search requests it is possible that such Realms filter is rendered as empty, thus voiding any restriction on requester privileges. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.7, from 4.1.0-M0 through 4.1.2. Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.

