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

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-15 · updated 2026-10-24
Weakness: CWE-125

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

taosdata TDengine: before 3.4.1.15

References

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

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