CVE-2026-65959: Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-10-30
Weakness: CWE-862

Description

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

Affected products

vitessio vitess: before 24.0.2 — fixed in 24.0.2
vitessio vitess: through 24.0.2

How to fix

Upgrade to a fixed version: vitessio vitess 24.0.2. Check the vendor advisory for mitigations.

References

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