CVE-2026-25243

HIGH

redis-server RESTORE invalid memory access may allow remote code execution

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 4 public exploits for CVE-2026-25243. PoCs published by Unclecheng-li, MillerDetach, SmashMythAmp.

AI-analyzed exploit summary This repository contains a functional exploit PoC for CVE-2026-25243, which targets an invalid memory access vulnerability in the Redis RESTORE command. The exploit leverages a crafted payload to trigger a heap-based buffer overflow, potentially leading to remote code execution.

Description

Redis is an in-memory data structure store. In versions of redis-server up to 8.6.3, the RESTORE command does not properly validate serialized values. An authenticated attacker with permission to execute RESTORE can supply a crafted serialized payload that triggers invalid memory access and may lead to remote code execution. A workaround is to restrict access to the RESTORE command with ACL rules. This is patched in version 8.6.3.

Exploits (4)

github WORKING POC 390 stars
by Unclecheng-li · cpoc
https://github.com/Unclecheng-li/poc-lab/tree/main/CVE-2026-25243 Invalid Memory Access in Redis RESTORE Command May Lead to Remote Code Execution

This repository contains a functional exploit PoC for CVE-2026-25243, which targets an invalid memory access vulnerability in the Redis RESTORE command. The exploit leverages a crafted payload to trigger a heap-based buffer overflow, potentially leading to remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Redis/Valkey (versions affected by CVE-2026-25243)
Auth required
Prerequisites: Network access to Redis/Valkey instance · Valid authentication credentials · RESTORE command access
devstral-2 · analyzed May 27, 2026 Full analysis →
github WORKING POC
by MillerDetach · pythonpoc
https://github.com/MillerDetach/poc-lab-pro/tree/main/CVE-2026-25243 Invalid Memory Access in Redis RESTORE Command May Lead to Remote Code Execution

The repository contains a functional exploit PoC for CVE-2026-25243, demonstrating an invalid memory access vulnerability in the Redis RESTORE command that can lead to remote code execution. The exploit uses a crafted payload to trigger a heap-based buffer overflow, with detailed instructions and code to reproduce the issue.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Redis/Valkey (versions prior to the fix in commit fea0b4064)
Auth required
Prerequisites: Access to Redis/Valkey server with RESTORE command permissions · Debug commands enabled on the server
devstral-2 · analyzed Jun 09, 2026 Full analysis →
github WORKING POC
by SmashMythAmp · pythonpoc
https://github.com/SmashMythAmp/poc-lab-605/tree/main/CVE-2026-25243 Invalid Memory Access in Redis RESTORE Command May Lead to Remote Code Execution

This repository contains a functional exploit PoC for CVE-2026-25243, demonstrating an invalid memory access vulnerability in the Redis RESTORE command that can lead to remote code execution. The exploit uses a crafted payload to trigger a heap buffer overflow in the zipmap parsing logic.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Redis/Valkey (versions prior to the fix in commit fea0b4064)
Auth required
Prerequisites: Network access to Redis/Valkey server · Valid authentication credentials · DEBUG command enabled on the server
devstral-2 · analyzed Jun 06, 2026 Full analysis →
github WORKING POC
by LadyAqueduct · htmlpoc
https://github.com/LadyAqueduct/poc-lab-798/tree/main/CVE-2026-25243 Invalid Memory Access in Redis RESTORE Command May Lead to Remote Code Execution

This repository contains a functional exploit PoC for CVE-2026-25243, demonstrating an invalid memory access vulnerability in the Redis RESTORE command that can lead to remote code execution. The exploit uses a crafted payload to trigger a heap-based buffer overflow in the zipmap parsing logic.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Redis/Valkey (versions prior to the fix in commit fea0b4064)
Auth required
Prerequisites: Network access to Redis/Valkey instance · Valid authentication credentials · DEBUG command enabled on the server
devstral-2 · analyzed Jun 06, 2026 Full analysis →

References (2)

Core 2
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/redis/redis/releases/tag/8.6.3

Scores

CVSS v3 8.8
EPSS 0.0011
EPSS Percentile 28.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-122
Status published
Products (1)
redis/redis < 8.6.3 (2 CPE variants)
Published May 05, 2026
Tracked Since May 05, 2026