Vulnerability in Apache Syncope
CVE-2026-42782
Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code reaching a non-sandboxed execution path via the class static initializer. 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 forcing even the static initializer in Groovy code to run in a sandbox.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.009 · change: +0.002
Affected products
- Apache Syncope — versions 4.1.0
- Apache Software Foundation Syncope — versions 3.0, 4.0, 4.1
Weakness classification (CWE)
References
- lists.apache.org/thread/b869ms0ofrd129f7tgsn9flxgv9ztg2r (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-42782?
- CVE-2026-42782 is a high-severity vulnerability in Apache Syncope, classified under CWE-653. CVSS score: 7.2/10. Published 2026-05-25.
- How severe is CVE-2026-42782?
- High severity. CVSS v3 base score is 7.2 out of 10.