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TI-2026-22308 Aliases CVE-2026-27965GHSA-8g8j-r87h-p36x

Vitess users with backup storage access can gain unauthorized access to production deployment environments

Priority HIGH 72CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00475 41st percentileScored 2026-11-07
Fix Fixed vitess (vitessio): 22.0.4, 23.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
backstagevitessbefore 22.0.4; 23.0.0 to before 23.0.322.0.4, 23.0.3Patch availableCNA
—vitess.io/vitess (Go)up to 0.23.2—No fix listedGHSA-8g8j-r87h-p36x
  • vitess Vendorbackstage Affected before 22.0.4; 23.0.0 to before 23.0.3 Fixed in 22.0.4, 23.0.3 Patch available CNA
  • vitess.io/vitess (Go) Vendor— Affected up to 0.23.2 Fixed in — No fix listed GHSA-8g8j-r87h-p36x

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:vitess:*:*:*:*:*:*:*:*before 22.0.4; 23.0.0 to before 23.0.3Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:vitess:*:*:*:*:*:*:*:* Versions before 22.0.4; 23.0.0 to before 23.0.3 Vulnerable ·backstage

Remediation

  • Fix · CNA vitess (vitessio) Fixed in 22.0.4, 23.0.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27965
  2. 2026-10-03 Alias added: GHSA-8g8j-r87h-p36x
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 3

Advisory 1

Other 2

  • TI-2026-46986 Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data CVSS 3.1MEDIUM 5.3
  • TI-2026-73584 Reflected cross-site scripting in Vitess vttablet /twopcz endpoint CVSS 3.1CRITICAL 9.8
  • TI-2026-22312 Vitess users with backup storage access can write to arbitrary file paths on restore CVSS 4.0CRITICAL 9.3
  • TI-2023-13623 Vitess VTAdmin users that can create shards can deny access to other functions CVSS 3.1MEDIUM 4.3
  • TI-2023-13622 vitess allows users to create keyspaces that can deny access to already existing keyspaces CVSS 3.1MEDIUM 4.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences