High severity · published Feb 26, 2026
CVE-2026-27969
Vitess users with backup storage access can write to arbitrary file paths on restore
8.8
CVSS
0.5%
EPSS
No
On KEV
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 files in the manifest — which may be files that they have also added to the manifest and backup contents — are written to any accessible location on restore. This is a common path traversal security issue. 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. No known workarounds are available.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vitess · vitessio
< 22.0.4; >= 23.0.0, < 23.0.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27969
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27969
Patch
https://github.com/vitessio/vitess/commit/c565cab615bc962bda061dcd645aa7506c59ca4a
Issue Tracking
https://github.com/vitessio/vitess/pull/19470
Patch
https://github.com/vitessio/vitess/security/advisories/GHSA-r492-hjgh-c9gw
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