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🛡️ CVE-2026-42797 — syncope

🟡 CVSS 4.9 — Medium ✅ No Known Exploit CWE-202 NVD
4.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Apache Syncope Vulnerable to Exposure of Sensitive Information Through Data Queries

Exposure of Sensitive Information Through Data Queries vulnerability in Apache Syncope.

An administrator with adequate entitlements for Derived Schemas can create a malicious JEXL expression which allows any administrator with sufficient entitlements for User read to access User-related security-sensitive information.

This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0.

Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by further restricting the JEXL expression definition.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: High — administrative rights are needed first.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-42797 is classified as CWE-202: Exposure of Sensitive Information Through Data Queries. When trying to keep information confidential, an attacker can often infer some of the information by using statistics.

Affected software

CVE-2026-42797 is recorded against 2 packages.

  • org.apache.syncope.core:syncope-core-provisioning-api (from 4.1.0-M0 up to 4.1.1)
  • syncope

Timeline and source

Published on 26 May 2026 and last revised on 30 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

nvd.nist.gov (Advisory)
github.com (Package)
lists.apache.org (Web)
www.openwall.com (Web)

Same weakness in other software

These advisories are the same class of weakness (CWE-202: Exposure of Sensitive Information Through Data Queries) in other software:

Details

Severity Medium
CVSS Score 4.9
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE CWE-202
Public Exploit ✅ No
Source NVD
Published 2026-05-26
Updated 2026-08-20
Modified 2026-06-30
Fix URL N/A

Affected Packages

Software From version Fixed in
org.apache.syncope.core:syncope-core-provisioning-api 4.1.0-M0 4.1.1
syncope — —

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