CVE-2026-62349Public exploitNetwork attack vector

Authenticated service crash via escape-sequence buffer overrun

Published Jul 15, 2026 · Updated Jul 15, 2026

Stack-based buffer overflow in TAOS Data TDengine 3.4.1.6 and earlier allows remote authenticated users to crash the service via SQL. trimString() in source/libs/parser/src/parUtil.c checks room for one byte, then copies two-byte %, _, or \x escape sequences into the stack-based tmpTokenBuf buffer. An authenticated user must be able to submit crafted SQL string literals; a crash is demonstrated, while code execution is reported but not demonstrated.

CVSS severity8.3
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in TAOS Data TDengine 3.4.1.6 and earlier allows remote authenticated users to crash the service via SQL. trimString() in source/libs/parser/src/parUtil.c checks room for one byte, then copies two-byte %, _, or \x escape sequences into the stack-based tmpTokenBuf buffer. An authenticated user must be able to submit crafted SQL string literals; a crash is demonstrated, while code execution is reported but not demonstrated.

The record

CVE
CVE-2026-62349
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
TAOS Data
Product
TDengine
Classifications
CWE-121, CWE-787, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.4.1.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TAOS Data · TDengineversion=< 3.4.1.14

Published CVSS scores

8.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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