VulnerabilityPublished 6 Aug 2026

CVE-2026-19153: Google Chrome · Insufficient Validation of Untrusted Input

Affects Google ChromeSource CVE Database V5

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Not known to be exploited · CVSS 8.1 High : upgrade to 151.0.7922.109 soon.

Data as of 5 Nov 2026, 00:01 UTC

CVSS 3.1 base score

8.1High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 151.0.7922.109

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 6 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Google Chrome to 151.0.7922.109.

Affected software

Product	Affected	Fixed in
GoogleChrome	Affected >=151.0.7922.109 <151.0.7922.109	Fixed in 151.0.7922.109

AI-suggested

The vendor advisory link is provided but does not explicitly confirm patch availability or remediation status. Users should update to Chrome version 151.0.7922.109 or later once confirmed patched. Until then, exercise caution with untrusted content and consider limiting renderer process exposure.

Description

A high-severity vulnerability in Google Chrome prior to version 151.0.7922.109 involves insufficient validation of untrusted input in Workers. This flaw allows a remote attacker who has compromised the renderer process to bypass site isolation by using a crafted HTML page. The vulnerability has a CVSS score of 8.1, indicating a significant risk to confidentiality and integrity. No known exploits are reported in the wild. A vendor advisory link is provided but does not explicitly state the patch status.

Impact

Successful exploitation allows bypassing of site isolation, potentially exposing sensitive data from other sites within the browser process. This compromises confidentiality and integrity of user data. There is no indication of availability impact. No known active exploitation has been reported.

Summary

CVE-2026-19153 is a vulnerability in Google Chrome's Workers component affecting versions before 151.0.7922.109. It arises from insufficient validation of untrusted input, enabling a remote attacker with renderer process access to bypass site isolation protections via a crafted HTML page. This could lead to unauthorized access to data across site boundaries. The vulnerability is rated high severity with a CVSS 3.1 score of 8.1 (Network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality and integrity impact, no availability impact).

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Description

AI analysisMachine-generated, updated 14 Aug 2026, 16:04 UTC

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