Vulnerability details

CVE-2026-62349

taosdata TDengine

TDengine: Off-by-One Buffer Overflow

CVSS 3.1

8.3High

Official description

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.

CVSS scores

Score	Version	Source	Vector
8.3High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H`

Affected products

Vendor	Product	Versions	Source
taosdata	TDengine	< 3.4.1.14	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/taosdata/TDengine/security/advisories/GHSA-4v5h-fxjw-vrmq x_refsource_CONFIRM

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Details

Published: 2026-07-15
Last updated: 2026-07-15
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.49%

Probability of exploitation in 30 days

42.9%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Partial

Weaknesses (CWE)

CWE-121
Stack-based Buffer Overflow
CWE-787
Out-of-bounds Write