What is CVE-2026-65959?

CVE-2026-65959 is a medium-severity vulnerability in Vitessio Vitess, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-08-18.

How severe is CVE-2026-65959?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Vitessio Vitess

CVE-2026-65959

Vitess is a database clustering system for horizontal scaling of MySQL. In 24.0.2 and earlier, the /debug/vrlog endpoint registered by addHttpEndpoint() in go/vt/vttablet/tabletmanager/vreplication/vrlog.go invokes vrlogStatsHandler() without acl.CheckAccessHTTP(r, acl.DEBUGGING), unlike comparable debug endpoints. A remote caller who can reach the vttablet debug HTTP port can bypass the configured security policy and stream VrLogStats data produced from NewVrLogStats().Send(), including literal SQL statements and bound application values from MoveTables, Reshard, Materialize, and vitess-strategy Online DDL workflows

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Vitessio Vitess — versions <= 24.0.2

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-65959?: CVE-2026-65959 is a medium-severity vulnerability in Vitessio Vitess, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-08-18.
How severe is CVE-2026-65959?: Medium severity. CVSS v3 base score is 5.3 out of 10.