CVE-2026-62351: CWE-125: Out-of-bounds Read in taosdata TDengine
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.
AI Analysis
Technical Summary
CVE-2026-62351 is an out-of-bounds read vulnerability in the TDengine time-series database prior to version 3.4.1.15. The vulnerability exists in the transDecompressMsg() function within source/libs/transport/src/transComm.c, which reads the contLen field of the STransCompMsg structure without verifying that the RPC packet contains the full 8-byte structure when pHead->comp equals 1. This improper validation can cause an unauthenticated attacker to trigger an out-of-bounds read, uncontrolled memory allocation, integer underflow, and a server crash. The vulnerability is addressed in TDengine version 3.4.1.15.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to cause a denial of service by crashing the TDengine server. There is no indication of confidentiality or integrity impact. The CVSS v3.1 score is 7.5 (high) with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Mitigation Recommendations
A fix is available in TDengine version 3.4.1.15. Users should upgrade to this version or later to remediate the vulnerability. No other mitigation or temporary workaround is indicated.
CVE-2026-62351: CWE-125: Out-of-bounds Read in taosdata TDengine
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.
CVSS v3.1
Score 7.5high
Affected software
pkg:github/taosdata/TDengineRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-62351 is an out-of-bounds read vulnerability in the TDengine time-series database prior to version 3.4.1.15. The vulnerability exists in the transDecompressMsg() function within source/libs/transport/src/transComm.c, which reads the contLen field of the STransCompMsg structure without verifying that the RPC packet contains the full 8-byte structure when pHead->comp equals 1. This improper validation can cause an unauthenticated attacker to trigger an out-of-bounds read, uncontrolled memory allocation, integer underflow, and a server crash. The vulnerability is addressed in TDengine version 3.4.1.15.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to cause a denial of service by crashing the TDengine server. There is no indication of confidentiality or integrity impact. The CVSS v3.1 score is 7.5 (high) with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Mitigation Recommendations
A fix is available in TDengine version 3.4.1.15. Users should upgrade to this version or later to remediate the vulnerability. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-13T21:42:50.096Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a57dcf368715ace434afb6e
Added to database: 07/15/2026, 19:18:11 UTC
Last enriched: 07/15/2026, 19:32:32 UTC
Last updated: 07/15/2026, 20:15:07 UTC
Views: 6
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