Use-After-Free Vulnerability in Redis with TLS Support
CVE-2026-81934

9.2CRITICAL

Key Information:

Vendor

Redis

Status
Redis
Vendor
CVE Published:
27 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-81934?

Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which processes incoming TLS data. When configured for TLS support, this vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands with the privileges of the Redis server. This could lead to significant security risks if exploited. Users are strongly advised to upgrade to the fixed versions to mitigate potential attacks.

Affected Version(s)

Redis 8.8.0

Redis 8.2.9

Redis 8.4.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-81934 - Proof of Concept

References

https://github.com/redis/redis/commit/6d088c335d5c3ec49a6...
patch
https://github.com/v12-security/pocs/tree/main/redis/serv...
exploit
https://raw.githubusercontent.com/redis/redis/8.2/00-RELE...
release-notes

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.