Vulnerability in Dataease
CVE-2026-32939
DataEase is an open source data visualization analysis tool. Versions 2.10.19 and below have inconsistent Locale handling between the JDBC URL validation logic and the H2 JDBC engine's internal parsing. DataEase uses String.toUpperCase() without specifying an explicit Locale, causing its security checks to rely on the JVM's default runtime locale, while H2 JDBC always normalizes URLs using Locale.ENGLISH. In Turkish locale environments (tr_TR), Java converts the lowercase letter i to İ (dotted capital I) instead of the standard I, so a malicious parameter like iNIT becomes İNIT in DataEase's filter (bypassing its blacklist) while H2 still correctly interprets it as INIT. This discrepancy allows attackers to smuggle dangerous JDBC parameters past DataEase's security validation, and the issue has been confirmed as exploitable in real DataEase deployment scenarios running under affected regional settings. The issue has been fixed in version 2.10.20.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- Dataease — versions < 2.10.20
Weakness classification (CWE)
References
- github.com/dataease/dataease/security/advisories/GHSA-pj7p-3m49-52qq (Exploit, Vendor Advisory)
- github.com/dataease/dataease/commit/8f1c21834a620d37dafb3fa24605c059d0a5b80d (Patch)
- github.com/dataease/dataease/releases/tag/v2.10.20 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-32939?
- CVE-2026-32939 is a high-severity vulnerability in Dataease, classified under Improper Handling of Case Sensitivity. CVSS score: 8.1/10. Published 2026-03-20.
- How severe is CVE-2026-32939?
- High severity. CVSS v3 base score is 8.1 out of 10.