Vulnerability · Published Jul 15, 2026 · Assigned by GitHub_M

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

High 7.5

In plain English

A high-severity out-of-bounds read in TDengine from taosdata. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 66.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
taosdata	TDengine	< 3.4.1.15

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/taosdata/TDengine/security/advisories/GHSA-8pc4-p252-f5m7 x_refsource_CONFIRM