Buffer overflow in Taosdata Tdengine
CVE-2026-62349
TDengine is an open source, time-series database optimized for Internet of Things devices. In 3.4.1.6 and earlier, source/libs/parser/src/parUtil.c trimString() checks space for only one byte before processing SQL string escape sequences \%, \_, or \x, allowing a one-byte out-of-bounds write to the stack buffer tmpTokenBuf that can cause denial of service and potentially remote code execution. This issue is fixed in version 3.4.1.14.
Vulnerability class: Buffer Overflow
EPSS: 0.006 (44.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H.
Affected products
- Taosdata Tdengine — versions < 3.4.1.14
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-62349?
- CVE-2026-62349 is a high-severity vulnerability in Taosdata Tdengine, classified under Stack-based Buffer Overflow. CVSS score: 8.3/10. Published 2026-07-15.
- How severe is CVE-2026-62349?
- High severity. CVSS v3 base score is 8.3 out of 10.