Quick answers
- Is CVE-2026-62355 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-62355 being exploited in the wild.
- How severe is CVE-2026-62355?
- Medium severity, with a CVSS score of 5.4, published 15 July 2026.
- Which products and versions are affected?
- TAOS Data TDengine < 3.4.1.15.
- Is there a fix for CVE-2026-62355?
- A patch was published on 2026-07-15: Fix confirmed in version 3.4.1.15 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-62355 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-62355?
- Check whether you run TAOS Data TDengine at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A privilege management vulnerability (CWE-269) exists in TDengine Cloud DB instances. The root cause is an improper authorization check where users assigned the 'Data Reader' role—who should be restricted to read-only access for non-database objects—are permitted to execute 'create udf' commands. While other administrative actions like 'show dnodes' and 'create user' are correctly denied, the ability to create User-Defined Functions (UDFs) bypasses intended access controls. An authenticated attacker with low-level privileges can exploit this over the network to inject custom logic into the database environment. The issue is resolved in version 3.4.1.15.
Affected products
- taosdata TDengine < 3.4.1.15
Timeline
- 2026-06-26: advisory: Initial GitHub advisory published
- 2026-07-15: disclosed: NVD publication date
- 2026-07-15: patched: Fix confirmed in version 3.4.1.15