CVE-2026-104252

CRITICALPre-NVD 9.89.8
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-15. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-100525 (ENISA EUVD) · GHSA-v75v-6fpf-gvw8 (GitHub Security Advisories) · GO-2026-6798 (OSV.dev)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
60
EG Risk 60/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.2%
EPSS %ILE
67th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 13, 2026

Last Modified

October 23, 2026

Advisory Details (9)

Auto-updated Nov 7, 2026
Patch available. Sources: github, github_commit, github_pr, github_release.
GitHub advisoryMentions a patch (unverified)

Vitess vttablet /twopcz reflected XSS · Advisory · vitessio/vitess · GitHub

Affected: v23.0.5 and v24.0.2 (

https://github.com/vitessio/vitess/security/advisories/GHSA-v75v-6fpf-gvw8
GitHub release Patch Available

Vitess v24.0.2

Patch available: vitessio/vitess v24.0.2

https://github.com/vitessio/vitess/releases/tag/v24.0.2
GitHub release Patch Available

Vitess v23.0.5

Patch available: vitessio/vitess v23.0.5

https://github.com/vitessio/vitess/releases/tag/v23.0.5
GitHub pull request

[release-24.0] tabletserver: escape reflected form values in twopcz handler (#20255)

Fix merged in vitessio/vitess PR #20274 on 2026-06-09 — awaiting tagged release

https://github.com/vitessio/vitess/pull/20274
GitHub pull request

[release-23.0] tabletserver: escape reflected form values in twopcz handler (#20255)

Fix merged in vitessio/vitess PR #20273 on 2026-06-09 — awaiting tagged release

https://github.com/vitessio/vitess/pull/20273
GitHub pull request

tabletserver: escape reflected form values in twopcz handler

Fix merged in vitessio/vitess PR #20255 on 2026-06-09 — awaiting tagged release

https://github.com/vitessio/vitess/pull/20255
GitHub commit

commit c1ed96302e65 (vitessio/vitess)

Fix landed in vitessio/vitess commit c1ed96302e65 — awaiting tagged release

https://github.com/vitessio/vitess/commit/c1ed96302e658190168c971afdac730cf70e43f7
GitHub commit

commit 976e1e0d78f9 (vitessio/vitess)

Fix landed in vitessio/vitess commit 976e1e0d78f9 — awaiting tagged release

https://github.com/vitessio/vitess/commit/976e1e0d78f9d29d02e5e31b4aa7e180648f08af
GitHub commit

commit 3140c1846cd1 (vitessio/vitess)

Fix landed in vitessio/vitess commit 3140c1846cd1 — awaiting tagged release

https://github.com/vitessio/vitess/commit/3140c1846cd120db34f33b2083139b4ab638aed2

Vendor Advisories for CVE-2026-104252(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
govitess.io/vitess @ 0.23.5 (fixes < 0.23.5)—ghsa
govitess.io/vitess @ 0.24.2 (fixes >= 0.24.0, < 0.24.2)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
vitess.io/vitess—
  • every version up to 0.23.5: fixed in 0.23.5
  • 0.24.0 up to 0.24.2: fixed in 0.24.2
—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 62× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-12 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  2. 2026-11-12 13:14 UTCEchelonGraph re-scored
  3. 2026-11-12 13:14 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-11 16:37 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  5. 2026-11-11 13:24 UTCEchelonGraph re-scored
  6. 2026-11-11 13:24 UTCVendor advisory
  7. 2026-11-11 13:24 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-11-10 16:41 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  9. 2026-11-10 13:34 UTCEchelonGraph re-scored
  10. 2026-11-10 13:34 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-11-09 16:34 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  12. 2026-11-09 13:41 UTCEchelonGraph re-scored
  13. 2026-11-09 13:41 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-11-08 16:38 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  15. 2026-11-08 13:52 UTCEchelonGraph re-scored
  16. 2026-11-08 13:52 UTCVendor advisory
  17. 2026-11-08 13:52 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-11-07 16:38 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  19. 2026-11-07 14:02 UTCEchelonGraph re-scored
  20. 2026-11-07 14:02 UTCVendor advisory
  21. 2026-11-07 14:02 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-11-06 16:35 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  23. 2026-11-06 14:12 UTCEchelonGraph re-scored
  24. 2026-11-06 14:12 UTCVendor advisory
  25. 2026-11-06 14:12 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
Show 71 more
  1. 2026-11-05 21:55 UTCOSV refresh
  2. 2026-11-05 16:36 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  3. 2026-11-05 14:23 UTCEchelonGraph re-scored
  4. 2026-11-05 14:23 UTCVendor advisory
  5. 2026-11-05 14:23 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-04 16:34 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  7. 2026-11-04 14:33 UTCEchelonGraph re-scored
  8. 2026-11-04 14:33 UTCVendor advisory
  9. 2026-11-04 14:33 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-11-03 16:46 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  11. 2026-11-03 14:43 UTCEchelonGraph re-scored
  12. 2026-11-03 14:43 UTCVendor advisory
  13. 2026-11-03 14:42 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-11-02 16:43 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  15. 2026-11-02 14:32 UTCEchelonGraph re-scored
  16. 2026-11-02 14:32 UTCVendor advisory
  17. 2026-11-02 14:32 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-11-01 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  19. 2026-11-01 14:43 UTCVendor advisory
  20. 2026-11-01 14:43 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-11-01 08:00 UTCGHSA enrichmentGHSA-v75v-6fpf-gvw8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-11-01 08:00 UTCEchelonGraph re-scored
  23. 2026-10-31 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  24. 2026-10-31 14:53 UTCEchelonGraph re-scored
  25. 2026-10-31 14:53 UTCVendor advisory
  26. 2026-10-30 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  27. 2026-10-30 15:03 UTCEchelonGraph re-scored
  28. 2026-10-30 15:03 UTCVendor advisory
  29. 2026-10-29 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  30. 2026-10-29 15:14 UTCEchelonGraph re-scored
  31. 2026-10-29 15:14 UTCVendor advisory
  32. 2026-10-28 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  33. 2026-10-28 15:24 UTCEchelonGraph re-scored
  34. 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  35. 2026-10-27 15:34 UTCEchelonGraph re-scored
  36. 2026-10-27 15:34 UTCVendor advisory
  37. 2026-10-26 16:30 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  38. 2026-10-26 15:29 UTCEchelonGraph re-scored
  39. 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  40. 2026-10-25 15:08 UTCVendor advisory
  41. 2026-10-25 14:56 UTCEchelonGraph re-scored
  42. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  43. 2026-10-24 15:17 UTCEchelonGraph re-scored
  44. 2026-10-24 15:17 UTCVendor advisory
  45. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  46. 2026-10-23 15:06 UTCEchelonGraph re-scored
  47. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  48. 2026-10-22 15:15 UTCEchelonGraph re-scored
  49. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  50. 2026-10-21 15:23 UTCEchelonGraph re-scored
  51. 2026-10-21 15:23 UTCVendor advisory
  52. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  53. 2026-10-20 15:32 UTCEchelonGraph re-scored
  54. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  55. 2026-10-19 15:42 UTCEchelonGraph re-scored
  56. 2026-10-19 15:42 UTCVendor advisory
  57. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  58. 2026-10-18 15:50 UTCVendor advisory
  59. 2026-10-18 05:09 UTCEchelonGraph re-scored
  60. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  61. 2026-10-17 15:58 UTCEchelonGraph re-scored
  62. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  63. 2026-10-16 16:06 UTCEchelonGraph re-scored
  64. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  65. 2026-10-15 16:27 UTCEchelonGraph re-scored
  66. 2026-10-15 15:23 UTCEchelonGraph re-scored
  67. 2026-10-15 00:39 UTCEchelonGraph re-scored
  68. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  69. 2026-10-13 20:26 UTCEchelonGraph re-scored
  70. 2026-10-13 19:36 UTCEchelonGraph re-scoredFirst assessed: 9.8 CRITICAL
  71. 2026-10-13 19:34 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-104252?
CVE-2026-104252 is a critical-severity vulnerability; its CVE record was published on October 13, 2026. 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…
When was the CVE record for CVE-2026-104252 published?
The CVE record for CVE-2026-104252 was published on October 13, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 23, 2026; the record at its source may have been updated since.
Is CVE-2026-104252 actively exploited?
CVE-2026-104252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (67th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104252?
CVE-2026-104252 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104252?
A fix for CVE-2026-104252 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-104252 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-104252

Explore →

Is Your Infrastructure Affected by CVE-2026-104252?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.