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CVE-2026-104252

CVE-2026-104252

validatedZero produced an exploit or a check.

GHSA-v75v-6fpf-gvw8 ↗EUVD-2026-100525 ↗

check availableZero validated a working check for it.proven exploitableZero has validated a full working exploit.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).+2.0dkevAttacks confirmed in the real world.
go:vitess.io/vitess < 0.23.5; >= 0.24.0, < 0.24.2
fixed in 0.23.5, 0.24.2
ETK-2026-1721Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:golang/vitess.io/vitess
cvss9.8cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
+2.1dTTV
42mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0dpublic poc+2.0dcheck + exploit+2.1d
0
+1d

description

Vitess deployments using affected versions of the vitess.io/vitess Go module can reflect untrusted values through the /twopcz HTTP handler. An unauthenticated attacker who can reach the endpoint may cause code to run in an operator's browser after the operator follows a malicious request, potentially exposing diagnostic data available to that browser. Exposure is greater when the HTTP interface is reachable and its ACL permits unauthenticated access.

mitigation

Upgrade vitess.io/vitess to 0.23.5 or 0.24.2, as appropriate for your release line. Until then, restrict /twopcz and the vttablet HTTP interface to trusted operators and enforce a restrictive ACL.

fixed in 0.23.5, 0.24.2

check
available
exploit
yes
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.89%58th percentile
agent run time
42m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-13 19:22Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
+2.0d
Δ to kevAttacks confirmed in the real world.
–

outcome

Differential: the exploit fired on the vulnerable build and stayed silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-13 19:22Z
    ghsa: trigger signal, started the run
    https://github.com/advisories/GHSA-v75v-6fpf-gvw8
  2. 2026-10-13 19:22Z
    public poc, published 2026-10-15 20:16Z
    https://github.com/advisories/GHSA-v75v-6fpf-gvw8
  3. 2026-10-13 19:22Z

this entry in the feed

GET /api/v1/feed/CVE-2026-104252

{
  "etk_id": "ETK-2026-1721",
  "cve_id": "CVE-2026-104252",
  "display_id": "CVE-2026-104252",
  "ghsa_id": "GHSA-v75v-6fpf-gvw8",
  "euvd_id": "EUVD-2026-100525",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Reflected XSS in Vitess /twopcz handler",
  "summary": "Vitess deployments using affected versions of the vitess.io/vitess Go module can reflect untrusted values through the /twopcz HTTP handler. An unauthenticated attacker who can reach the endpoint may cause code to run in an operator's browser after the operator follows a malicious request, potentially exposing diagnostic data available to that browser. Exposure is greater when the HTTP interface is reachable and its ACL permits unauthenticated access.",
  "mitigation": "Upgrade vitess.io/vitess to 0.23.5 or 0.24.2, as appropriate for your release line. Until then, restrict /twopcz and the vttablet HTTP interface to trusted operators and enforce a restrictive ACL.",
  "vendor": "go",
  "product": "go:vitess.io/vitess",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 0.23.5"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "0.23.5"
      ],
      "package_name": "vitess.io/vitess",
      "purl": "pkg:golang/vitess.io/vitess"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.24.0, < 0.24.2"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "0.24.2"
      ],
      "package_name": "vitess.io/vitess",
      "purl": "pkg:golang/vitess.io/vitess"
    }
  ],
  "cwes": null,
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0089,
  "epss_percentile": 0.5862,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": true,
  "pipeline_minutes": 42.40775301666667,
  "t0_at": "2026-10-13T19:22:58.208000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-15T21:52:47.147137+00:00",
      "days": 2.1040386474189816,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T19:22:58.208000+00:00",
      "url": null
    },
    "exploit": {
      "at": "2026-10-15T21:52:47.147137+00:00",
      "days": 2.1040386474189816,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T19:22:58.208000+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-15T20:16:29+00:00",
      "days": 2.037161944444444,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T19:22:58.208000+00:00",
      "url": "https://github.com/advisories/GHSA-v75v-6fpf-gvw8"
    },
    "trigger_signal": {
      "at": "2026-10-13T19:22:58.208000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T19:22:58.208000+00:00",
      "url": "https://github.com/advisories/GHSA-v75v-6fpf-gvw8"
    }
  }
}

published 2026-10-15 21:10Z
last change 2026-10-21 03:59Z

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