High 7.5Published Jun 10, 2026

CVE-2026-42542TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)

Updated under an hour ago (Oct 27, 2026, 3:10 PM ET)

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It affects taosdata TDengine and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for taosdata TDengine

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-191
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jun 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

taosdata TDengine taosdata:tdengine (from the name)	from 3.4.0.0, < 3.4.1.6	CNA record
tdengine tdengine tdengine:tdengine	from 3.4.0.0 before 3.4.1.6	NVD

References

References

https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.