Full Report
Redis security advisory (AV26-423)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Redis Software and OSS
## CVE Details
- **CVE IDs:**
- CVE-2026-23479
- CVE-2026-25243
- CVE-2026-25588
- CVE-2026-25589
- CVE-2026-23631
- **CVSS Score:** Varies by CVE (Specific scores not detailed in the summary advisory, but typically range from Medium to High for Redis core vulnerabilities).
- **CWE:** Not specifically listed in the advisory summary.
## Affected Systems
- **Products:** Redis Software (Enterprise) and Redis Open Source Software (OSS)/Community Edition (CE).
- **Versions:** Multiple versions are affected across both the Enterprise and OSS branches.
- **Configurations:** Standard deployments of Redis; specifically those exposed to untrusted network traffic or those with specific administrative features enabled.
## Vulnerability Description
While the high-level advisory indicates multiple security flaws, these typical Redis vulnerabilities generally involve:
1. **Memory Corruption/Buffer Overflows:** Potential for crashes or code execution.
2. **Insecure Command Handling:** Flaws in how specific Redis commands process input, leading to potential privilege escalation or data exposure.
3. **Denial of Service (DoS):** Exploits that can cause the Redis process to hang or terminate unexpectedly.
## Exploitation
- **Status:** Not reported as exploited in the wild at the time of publication.
- **Complexity:** Generally Medium to High (often requires authenticated access unless the instance is exposed).
- **Attack Vector:** Network (Remote).
## Impact
- **Confidentiality:** Potential for unauthorized data access depending on the specific CVE.
- **Integrity:** Potential for data modification.
- **Availability:** High (Risk of service disruption/Denial of Service).
## Remediation
### Patches
Users should upgrade to the latest stable versions provided by Redis:
- For Redis OSS: Update to the latest maintenance releases (e.g., check for updates in branches 6.2.x, 7.0.x, 7.2.x, or 7.4.x depending on status).
- For Redis Software (Enterprise): Follow the upgrade path established in the Redis Enterprise console.
### Workarounds
- **ACL Restriction:** Use Access Control Lists (ACLs) to disable dangerous commands (e.g., `FLUSHALL`, `CONFIG`, `DEBUG`) for non-privileged users.
- **Network Isolation:** Ensure Redis is not exposed to the public internet; use firewalls and VPCs to restrict access only to trusted application servers.
- **TLS Encryption:** Enable TLS to prevent credential sniffing that could lead to exploitation.
## Detection
- **Indicators of Compromise:** Monitor logs for frequent crashes of the `redis-server` process or an unusual volume of administrative commands.
- **Detection Methods:** Use security scanning tools (e.g., Nessus, Qualys) updated with the latest CVE plugins for Redis.
## References
- Redis Security Blog: hxxps[://]redis[.]io/blog/security-advisory-cve202623479-cve202625243-cve-2026-25588-cve202625589-cve-2026-23631/
- Redis Security Advisories: hxxps[://]redis[.]io/blog/
- Canadian Centre for Cyber Security Advisory (AV26-423): hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/redis-security-advisory-av26-423