Apache Syncope EUVD-2026-115155

Exploitation requires an authenticated Apache Syncope administrator who holds adequate entitlements; without such a privileged account the vulnerable opEvent handling cannot be reached. The specific trigger is injection through the unsanitized opEvent parameter(s), and the backing database must permit stacked (multi-statement) queries for the arbitrary-SQL execution to take full effect. Deployments running 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.8, or 4.1.0-M0 through 4.1.3 are affected; upgrading to 4.0.9 or 4.1.4 is the stated fix. Note this is an incomplete fix for CVE-2026-77051, so systems patched only for that earlier issue remain vulnerable. The high-privilege admin requirement is the primary limiting factor constraining realistic exploitation.

No CVSS score or vector was provided in the input (CVSS Score: N/A, CVSS Vector: N/A), so severity signals must be inferred from the description rather than read from a confirmed vector. The description is explicit that exploitation requires 'an administrator with adequate entitlements,' which means this is a post-authentication, high-privilege flaw rather than an unauthenticated remote issue - a significant mitigating factor. The technical impact is nonetheless severe: arbitrary SQL execution via stacked queries against the Syncope backing database can mean full read/write of identity, credential, and policy data. There is no CISA KEV listing, no EPSS score supplied, and no POC or exploit reference in the input, so there is no evidence of active or imminent exploitation. The vuln.today Decision label is 'this_week,' indicating prompt but non-emergency remediation. The dominant risk-limiting consideration is the admin-entitlement prerequisite: an attacker must already hold a privileged Syncope administrative role, so realistic risk centers on insider abuse, privilege escalation chained from a compromised admin account, or lateral movement - not mass opportunistic exploitation. This reads as a genuine but bounded priority: high technical impact gated behind high privilege, warranting scheduled patching rather than crisis response.

An attacker who has obtained a Syncope administrator account with sufficient entitlements (via insider access, credential theft, or an earlier compromise) submits a crafted opEvent parameter that is not properly sanitized, injecting a stacked SQL query. Because stacked queries are supported, the injected statement executes arbitrary SQL beyond the intended read, allowing modification or exfiltration of identity and credential data in the backing database. No public exploit was identified in the provided data, and the flaw is explicitly an incomplete fix of CVE-2026-77051, so environments patched only against the prior CVE remain exposed.