CVE-2026-62351 TDengine: Unauthenticated Remote Denial of Service via Out-of-Bounds Read in transDecompressMsg
An unauthenticated remote attacker can crash the TDengine server by sending a malformed RPC packet, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-62351?
CVE-2026-62351 is a high-severity denial of service vulnerability in taosdata TDengine, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-125
Which versions are affected by CVE-2026-62351?
How do I fix CVE-2026-62351?
No fix has been published for CVE-2026-62351 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-62351 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-62351 exists.