9.8

CVE-2026-104252: vitessio vitess Cross-site Scripting

CVSS: 9.8v3.1CriticalAwaiting analysis
AliasesGHSA-v75v-6fpf-gvw8CGA-233c-qcgr-7vg5CGA-25q9-vjvh-mf9h
Published 13-10-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-104252 is a critical (CVSS 9.8) Cross-site Scripting vulnerability in vitessio vitess. EPSS estimates a 0.89% chance of exploitation in the next 30 days, higher than 58.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.89%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-10-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

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's browser after the request is opened. The script runs with the vttablet debug origin and can read same-origin diagnostic endpoints that expose query, transaction, environment, variable, or profiling data available in that deployment. This issue is fixed in versions 23.0.5 and 24.0.2.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.89%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

14-10-202620-10-2026
EPSS score
0.89%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • vitess-22All versions (No fix recorded)
  • vitess-22-binariesAll versions (No fix recorded)
Vitess.io1 product
  • vitess< 0.23.5 | ≥ 0.24.0, < 0.24.2
Vitessio1 product
  • vitess< 23.0.5 | ≥ 24.0.0, < 24.0.2

3 vendors · 4 products

References

12 links
Show all 12 references