Medium severity · published Aug 18, 2026
CVE-2026-65959
Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data
5.3
CVSS
0.4%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vitess · vitessio
<= 24.0.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65959
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65959
github.com
https://github.com/vitessio/vitess/commit/4c58cd70edc6b03d61cb65842c342ac08341e64f
github.com
https://github.com/vitessio/vitess/commit/657662e78bde1c82df680e9cc43a686d619f8094
github.com
https://github.com/vitessio/vitess/commit/d929225a450027406687d27af8dca45620945ceb
github.com
https://github.com/vitessio/vitess/security/advisories/GHSA-mhc4-g3wh-cw7m
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