Is there a public exploit for CVE-2026-123270?

No public exploit for CVE-2026-123270 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-123270?

CVE-2026-123270 scores CVSS 9.8 (v3.1), rated critical.

What does CVE-2026-123270 affect?

CVE-2026-123270 affects Redpanda Data Connect.

9.8 Critical

Redpanda Connect versions 4.39 to 4.110 contain a missing authentication vulnerability that enables unauthenticated remote code execution…

CVE-2026-123270

Redpanda Connect versions 4.39 to 4.110 contain a missing authentication vulnerability that enables unauthenticated remote code execution (RCE). In streams mode, the management HTTP API is exposed on 0.0.0.0:4195, but authentication is disabled by default and there is no authentication gate protecting the stream CRUD routes. An unauthenticated attacker with network access to TCP/4195 can POST a malicious pipeline definition to /streams/{id} that includes code-executing processors such as command, subprocess, ffi, or unsafe sqlraw, thereby achieving arbitrary RCE on the host with the permissions of the Redpanda Connect service account. Because pipelines can also return command output in-band via HTTP, this vulnerability enables full host compromise, credential theft, and data exfiltration with no user interaction or credentials required. Starting with v4.111, the API endpoint was reconfigured as opt-in, so this and later versions are no longer vulnerable by default. However, RCE remains achievable on v4.111 and later if the management API is manually enabled via the --bind-http flag.

Assessment

CVSS: 9.8 (v3.1)
Severity: Critical
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 9 November 2026
Last updated: 9 November 2026
Affected: Redpanda Data · Connect
Assigner: certcc

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

At the source

EUVD (ENISA)

References

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