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CVE-2026-62350

TDengine: UDF lead to RCE

TDengine is an open source, time-series database optimized for Internet of Things devices. Prior to 3.4.1.15, a user with create udf privilege could upload a crafted shared library and install it as a user-defined function, such as eval, then execute arbitrary C code on the TDengine server side through database queries. This issue is fixed in version 3.4.1.15.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Taosdata
Products
Tdengine
CVE-2026-62348

TDengine: KILL SSMIGRATE missing authorization lets low-privilege users interrupt shared-storage migrations

TDengine is a time-series database optimized for Internet of Things devices. Prior to 3.4.1.15, TDengine Enterprise allowed an authenticated low-privilege SQL user to run KILL SSMIGRATE <id> against an active shared-storage migration because mndProcessKillSsMigrateReq called mndKillSsMigrate while the intended MND_OPER_SSMIGRATE_DB privilege check was commented out. This issue is fixed in version 3.4.1.15.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Taosdata
Products
Tdengine
CVE-2026-62355

TDengine: Standard User permission unexpect

TDengine is an open source, time-series database optimized for Internet of Things devices. Prior to 3.4.1.15, a Data Reader admin_user on a TDengine Cloud DB instance could run create udf even though standard users should have read-only permissions for non-database objects and show dnodes and create user were denied. This issue is fixed in version 3.4.1.15.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Taosdata
Products
Tdengine
CVE-2026-62353

TDengine: Authenticated Out-of-Bounds Read in SQL Lexer tGetToken

TDengine is a time-series database optimized for Internet of Things devices. Prior to 3.4.1.14, source/libs/parser/src/parTokenizer.c tGetToken() incremented past a trailing backslash in a SQL string literal such as 'abc\ and read one byte beyond the null terminator, allowing an authenticated user who can submit SQL queries to crash the server and possibly leak adjacent memory. This issue is fixed in version 3.4.1.14.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Taosdata
Products
Tdengine
CVE-2026-62349

TDengine: Off-by-One Buffer Overflow

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 3.1 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
Taosdata
Products
Tdengine
CVE-2026-62351

TDengine: Unauthenticated Remote Denial of Service via Out-of-Bounds Read in transDecompressMsg

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.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Taosdata
Products
Tdengine
CVE-2026-42542

TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)

TDengine is an open source, time-series database optimized for Internet of Things devices. In versions 3.4.0.0 through 3.4.1.5, an unauthenticated remote attacker can crash the taosd server process by sending a single crafted RPC packet. No credentials or prior session state are required. Version 3.4.1.6 fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Taosdata Tdengine
Products
Tdengine Tdengine