Is CVE-2026-27965 actively exploited?

No active exploitation of CVE-2026-27965 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27965 be exploited remotely?

Yes. CVE-2026-27965 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27965?

CVE-2026-27965 has a CVSS score of 9.9 (CRITICAL) and an EPSS exploitation probability of 0.04%.

HOME VULNERABILITIESCVE-2026-27965

CRITICAL

CVE-2026-27965

CWE-78Published: February 26, 2026· Updated: Mar 2, 2026

9.9

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.2th

Official Description

Vitess is a database clustering system for horizontal scaling of MySQL. Prior to versions 23.0.3 and 22.0.4, anyone with read/write access to the backup storage location (e.g. an S3 bucket) can manipulate backup manifest files so that arbitrary code is later executed when that backup is restored. This can be used to provide that attacker with unintended/unauthorized access to the production deployment environment — allowing them to access information available in that environment as well as run any additional arbitrary commands there. Versions 23.0.3 and 22.0.4 contain a patch. Some workarounds are available. Those who intended to use an external decompressor then can always specify that decompressor command in the `--external-decompressor` flag value for `vttablet` and `vtbackup`. That then overrides any value specified in the manifest file. Those who did not intend to use an external decompressor, nor an internal one, can specify a value such as `cat` or `tee` in the `--external-decompressor` flag value for `vttablet` and `vtbackup` to ensure that a harmless command is always used.

NVD Source

Technical Analysis

CVE-2026-27965 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.9.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.