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CVE-2026-62351— TDengine: Unauthenticated Remote Denial of Service via Out-of-Bounds Read in transDecompressMsg

Quick assessment

Affected
taosdata TDengine
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TDengine是中国TDengine公司开源的一款开源、高性能、云原生时间序列数据库。 TDengine 3.4.1.15之前版本存在缓冲区错误漏洞，该漏洞源于transDecompressMsg()函数在未验证RPC数据包包含8字节STransCompMsg结构的情况下读取STransCompMsg.contLen，导致未经身份验证的越界读取、不受控制的内存分配、整数下溢和服务器崩溃。

CVSS 7.5 · High EPSS 0.46% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
taosdata TDengine < 3.4.1.15 affected
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I. Basic Information for CVE-2026-62351

Vulnerability Information
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Vulnerability Title
TDengine: Unauthenticated Remote Denial of Service via Out-of-Bounds Read in transDecompressMsg
Source: CVE Program / CVE List V5
Vulnerability Description
TDengine is a time-series database optimized for Internet of Things devices. Prior to 3.4.1.15, source/libs/transport/src/transComm.c transDecompressMsg() read STransCompMsg.contLen when pHead->comp == 1 without first validating that the RPC packet contained the 8-byte STransCompMsg structure, causing an unauthenticated out-of-bounds read, uncontrolled allocation, integer underflow, and server crash. This issue is fixed in version 3.4.1.15.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
TDengine 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TDengine是中国TDengine公司开源的一款开源、高性能、云原生时间序列数据库。 TDengine 3.4.1.15之前版本存在缓冲区错误漏洞，该漏洞源于transDecompressMsg()函数在未验证RPC数据包包含8字节STransCompMsg结构的情况下读取STransCompMsg.contLen，导致未经身份验证的越界读取、不受控制的内存分配、整数下溢和服务器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
taosdata TDengine < 3.4.1.15 -

II. Public POCs for CVE-2026-62351

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III. Intelligence Information for CVE-2026-62351

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Vendor Advisories for CVE-2026-62351 (1)

Same Patch Batch · taosdata · 2026-07-15 · 6 CVEs total

CVE-2026-62349 8.3 HIGH TDengine: Off-by-One Buffer Overflow
CVE-2026-62350 7.2 HIGH TDengine: UDF lead to RCE
CVE-2026-62348 5.4 MEDIUM TDengine: KILL SSMIGRATE missing authorization lets low-privilege users interrupt shared-s
CVE-2026-62353 5.4 MEDIUM TDengine: Authenticated Out-of-Bounds Read in SQL Lexer tGetToken
CVE-2026-62355 5.4 MEDIUM TDengine: Standard User permission unexpect

IV. Related Vulnerabilities

Same product: TDengine
Same vendor: taosdata
Same weakness: CWE-125

V. Comments for CVE-2026-62351

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