CVE-2025-5063VulnerabilityPublished 27 May 2025Updated 26 Feb 2026

CVE-2025-5063: Google Chrome · Use after free

Affects Google ChromeSource CVE Database V5

Not known to be exploited · CVSS 8.8 High : upgrade to 137.0.7151.55 soon.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

8.8High

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

EPSS: 3.4% chance of exploitation in 30 days – higher than 88% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 137.0.7151.55

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

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

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: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 27 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 2026-10-25.

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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC 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 137.0.7151.55.

Affected software

Product	Affected	Fixed in
Google Chrome	Affected =137.0.7151.55 <137.0.7151.55	Fixed in 137.0.7151.55

AI-suggested

To mitigate CVE-2025-5063, organizations should immediately update all instances of Google Chrome to version 137.0.7151.55 or later, where the vulnerability is patched. Beyond patching, implement strict web content filtering to block access to untrusted or suspicious websites that could host malicious HTML payloads. Employ browser sandboxing and endpoint protection solutions capable of detecting anomalous behavior indicative of exploitation attempts. Educate users about the risks of interacting with unknown or suspicious links and emails to reduce the likelihood of triggering the vulnerability. Network-level defenses such as intrusion prevention systems (IPS) should be tuned to detect exploitation attempts targeting Chrome vulnerabilities. Regularly audit and monitor browser versions across the enterprise to ensure compliance with patching policies. Consider deploying application allowlisting and restricting browser extensions to minimize attack surface. Finally, maintain robust incident response plans to quickly address any suspected exploitation.

Description

Use after free in Compositing in Google Chrome prior to 137.0.7151.55 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Impact

The impact of CVE-2025-5063 is substantial for organizations globally, as it enables remote attackers to execute arbitrary code by exploiting a use-after-free flaw in a widely used web browser. Successful exploitation can lead to full compromise of the affected system, including unauthorized data access, data manipulation, or system disruption. This can result in data breaches, loss of intellectual property, disruption of business operations, and potential lateral movement within corporate networks. Given Chrome's dominant market share across enterprise, government, and consumer environments, the vulnerability poses a broad risk surface. Organizations with high web exposure, such as financial institutions, healthcare providers, and critical infrastructure operators, face increased risk. The requirement for user interaction means phishing or drive-by download attacks could be vectors. The absence of known exploits currently provides a window for proactive mitigation, but the high severity demands urgent attention to prevent exploitation as threat actors may develop exploits rapidly.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Feb 2026, 21:58 UTC

Technical details

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