CVE-2026-62351
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk25th percentile - higher than 25% of all known CVEs
Summary
In TDengine before version 3.4.1.15, the transDecompressMsg() function reads the STransCompMsg.contLen field without first validating that the RPC packet contains the 8-byte STransCompMsg structure, leading to an unauthenticated out-of-bounds read, uncontrolled allocation, integer underflow, and server crash.
Risk Assessment
An attacker can remotely, without authentication, cause a crash of the TDengine server, leading to disruption of IoT monitoring systems and potential loss of time-series data.
Recommendation
Immediately upgrade TDengine to version 3.4.1.15 or later, which includes a fix for this vulnerability.
Other vulnerabilities in TDengine
See all- CVE-2026-62355Medium
In TDengine prior to version 3.4.1.15, a Data Reader user with admin_user role on a TDengine Cloud DB instance could execute create udf, even though standard users should have read-only permissions for non-database objects and commands like show dnodes and create user were denied.
- CVE-2026-62353Medium
In TDengine before version 3.4.1.14, the tGetToken() function in the SQL parser mishandles string literals ending with a backslash, causing an out-of-bounds read. An authenticated user can submit a crafted SQL query to crash the server and potentially leak adjacent memory.
- CVE-2026-62350High
In TDengine prior to version 3.4.1.15, a user with create UDF privilege can upload a crafted shared library and install it as a user-defined function, then execute arbitrary C code on the server side through database queries.
- CVE-2026-62349High
In TDengine version 3.4.1.6 and earlier, the trimString() function in parUtil.c incorrectly checks string length before processing SQL escape sequences, leading to a one-byte out-of-bounds write to the stack buffer tmpTokenBuf. This can cause denial of service and potentially remote code execution.
- CVE-2026-62348Medium
In TDengine Enterprise before version 3.4.1.15, an authenticated low-privilege SQL user could run KILL SSMIGRATE <id> against an active shared-storage migration because the MND_OPER_SSMIGRATE_DB privilege check was commented out in mndProcessKillSsMigrateReq.
- CVE-2026-42542High
TDengine versions 3.4.0.0 through 3.4.1.5 allow an unauthenticated remote attacker to crash the taosd server process by sending a single crafted RPC packet. The issue is fixed in version 3.4.1.6.
Original NVD description (English source)
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.