CVE-2026-27623
HIGHValkey 9.0.0-9.0.3 - Denial of Service via Empty Request Handling
Title source: llmExploitation Summary
EIP tracks 4 public exploits for CVE-2026-27623. PoCs published by Unclecheng-li, MillerDetach, SmashMythAmp.
AI-analyzed exploit summary The repository contains a functional exploit for CVE-2026-27623, demonstrating a pre-authentication DoS vulnerability in Valkey (Redis fork) by sending a malformed RESP request (`*0\r\nPING\r\n`) that triggers an assertion failure in the server's networking code.
Description
Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.
Exploits (4)
The repository contains a functional exploit for CVE-2026-27623, demonstrating a pre-authentication DoS vulnerability in Valkey (Redis fork) by sending a malformed RESP request (`*0\r\nPING\r\n`) that triggers an assertion failure in the server's networking code.
This repository contains a functional exploit PoC for CVE-2026-27623, a pre-authentication DoS vulnerability in Valkey (Redis fork) caused by a malformed RESP request. The exploit sends a crafted payload (*0\r\nPING\r\n) to trigger an assertion failure in the server's networking.c, causing the process to crash.
The repository contains a functional exploit PoC for CVE-2026-27623, demonstrating a pre-authentication DoS vulnerability in Valkey (Redis fork) by sending a malformed RESP request (`*0\r\nPING\r\n`) that triggers an assertion failure in the server's networking code.
The repository contains a functional exploit PoC for CVE-2026-27623, demonstrating a pre-authentication DoS vulnerability in Valkey (Redis fork) by sending a malformed RESP request (`*0\r\nPING\r\n`) that triggers an assertion failure in the server's networking code.
References (1)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H