---
id: "CVE-2026-121130"
kind: "vulnerability"
aliases: ["CVE-2026-121130"]
title: "Chrome: form observable discrepancy leaks sensitive data from crafted pages"
severity: "low"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browsers", "chrome", "end-users", "package"]
not_affected_if: ["chrome-updated"]
published_at: "2026-11-03T21:17:21+00:00"
first_seen_at: "2026-11-03T21:19:21+00:00"
updated_at: "2026-11-03T21:24:48+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121130", "first_seen_at": "2026-11-03T21:19:21+00:00"}]
---

# Chrome: form observable discrepancy leaks sensitive data from crafted pages

A flaw in how Google Chrome's Forms handle some inputs lets a remote attacker observe a difference in behavior and learn sensitive information. The attacker needs the victim to open a crafted HTML page; Chromium rates it Low severity.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Chrome version at chrome://settings/help or with `google-chrome --version`
- Confirm the version is below `157.0.8103.38`

## Fix

- Google Chrome: move to `157.0.8103.38` or later

## Timeline

- 2026-11-03T21:19:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121130

## From the sources

Observable discrepancy in Forms in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to obtain sensitive information via a crafted HTML page. (Chromium security severity: Low)

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_