Vulnerability · Published Jun 10, 2026 · Assigned by GitHub_M
CVE-2026-42542TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
High 7.5
In plain English
A high-severity security flaw in TDengine from taosdata. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 53.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
TDengine is an open source, time-series database optimized for Internet of Things devices. In versions 3.4.0.0 through 3.4.1.5, an unauthenticated remote attacker can crash the taosd server process by sending a single crafted RPC packet. No credentials or prior session state are required. Version 3.4.1.6 fixes the issue.
Affected products (as reported)
Weakness: CWE-191 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx x_refsource_CONFIRM
- https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6 x_refsource_MISC