PatchTheCEVCVE-2026-104252: Vitess is a database clustering system for horizontal scaling of MySQL
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CRITICAL 9.8REMOTEWATCHLISTUPGRADE
CVE-2026-104252 is a critical-severity flaw (CVSS 9.8) affecting vitess. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Vitess is a database clustering system for horizontal scaling of MySQL. Prior to 23.0.5 and 24.0.2, twopczHandler in go/vt/vttablet/tabletserver/twopcz.go writes the Action and dtid form values from the vttablet and vtcombo /twopcz HTTP debug endpoint into a text/html response without HTML escaping. Under the default allow-all ACL policy, a remote unauthenticated attacker can send an operator a crafted request that executes script in the operator
Why this priority
- Critical severity
- Public exploit reference
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.9% (top 41%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2026-10-13 |
| Last modified | 2026-10-23 |
Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
linuxfoundation vitess UPGRADE
Affected: < 23.0.5 · >= 24.0.0 and < 24.0.2
Fixed in: 23.0.5, 24.0.2
Safe to downgrade to: a release before 24.0.0
1. Check installed version
apt-cache policy vitess || rpm -q vitess || vitess --version
2. UPGRADE to 23.0.5 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade vitess
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade vitess
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 24.0.0 (Debian / Ubuntu)
apt-cache madison vitess
sudo apt install vitess=<VERSION_BEFORE_24.0.0>
sudo apt-mark hold vitess
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list vitess
sudo dnf downgrade vitess-<VERSION_BEFORE_24.0.0>
sudo dnf versionlock add vitess
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
Go · vitess.io/vitess · FIXED · 0.23.5 · vulnerable: < 0.23.5 · source
go get vitess.io/vitess@v0.23.5
go list -m vitess.io/vitess
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.