Improper Input Validation in Google Chrome ReaderMode

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: Chrome

Description

Improper input validation in ReaderMode in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Low)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-25

Last Modified

2026-08-25

Generated

2026-08-26

AI Q&A

2026-08-26

EPSS Evaluated

N/A

NVD

CVE-2026-78980

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 152.0.7977.65 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper input validation in ReaderMode in Google Chrome before version 152.0.7977.65. A remote attacker could exploit this by using social engineering to trick a user into visiting a crafted HTML page, which bypasses the web origin policy and allows access to a privileged page.

Impact Analysis

This vulnerability could allow an attacker to access privileged pages in your browser, potentially leading to unauthorized actions or data exposure. Social engineering is required, meaning attackers might use deceptive tactics to trick you into visiting a malicious page.

Mitigation Strategies

Update Google Chrome to version 152.0.7977.65 or later to address the improper input validation in ReaderMode.

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