WS-2026-0128
Published:September 17, 2026
Updated:October 13, 2026
RediSearch: the default KNN score field name is built in a stack variable-length array sized from the vector field name, so an FT.SEARCH KNN query on a vector field with a very long name exhausts the stack and crashes the Redis server (DoS). Fixed in 2.6.38, 2.8.39, 2.10.33, 8.2.16, 8.4.13 and 8.10.1 by allocating the name on the heap (PR #11126); 8.0.x, 8.6.x and 8.8.x have no fixed release.
Affected Packages
https://github.com/RediSearch/RediSearch.git (GITHUB):
Affected version(s) >=v8.4.0 <v8.4.13Fix Suggestion:
Update to version v8.4.13https://github.com/RediSearch/RediSearch.git (GITHUB):
Affected version(s) >=v2.10.0 <v2.10.33Fix Suggestion:
Update to version v2.10.33https://github.com/RediSearch/RediSearch.git (GITHUB):
Affected version(s) >=v8.2.0 <v8.2.16Fix Suggestion:
Update to version v8.2.16https://github.com/RediSearch/RediSearch.git (GITHUB):
Affected version(s) >=v2.8.0 <v2.8.39Fix Suggestion:
Update to version v2.8.39https://github.com/RediSearch/RediSearch.git (GITHUB):
Affected version(s) =v8.10.0 <v8.10.1Fix Suggestion:
Update to version v8.10.1https://github.com/RediSearch/RediSearch.git (GITHUB):
Affected version(s) >=v2.6.1 <v2.6.38Fix Suggestion:
Update to version v2.6.38Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Memory Allocation with Excessive Size Value