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Google Chrome CVE-2026-87620

| EUVDEUVD-2026-74448 MEDIUM
Observable Discrepancy (CWE-203)
2026-09-09 Chrome GHSA-rm5g-4g6x-8w79
6.5
CVSS 3.1 · Vendor: Chrome
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Severity by source

Vendor (Chrome) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vuln.today AI
4.3 MEDIUM

Network-delivered via crafted page (AV:N, UI:R); Chromium's Low severity suggests limited practical disclosure scope, warranting C:L over C:H.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Chrome).

CVSS VectorVendor: Chrome

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

Lifecycle Timeline

4
Analysis Generated
Sep 09, 2026 - 15:41 vuln.today
Patch available
Sep 09, 2026 - 01:03 EUVD
CVE Published
Sep 09, 2026 - 00:10 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 09, 2026 - 00:10 cve.org
MEDIUM 6.5

DescriptionCVE.org

Observable discrepancy in SVG in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to obtain sensitive information via a crafted HTML page. (Chromium security severity: Low)

AnalysisAI

Observable SVG discrepancy in Google Chrome prior to 153.0.8010.36 enables remote attackers to infer sensitive cross-origin information by inducing measurable rendering behavioral differences via a crafted HTML page. The root cause is CWE-203, a side-channel class where an attacker observes system behavior variations to deduce protected state. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Vulnerability AssessmentAI

Exploitation Exploitation requires a victim user to visit an attacker-controlled HTML page in Google Chrome prior to version 153.0.8010.36 - confirmed by UI:R in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) scores 6.5 and designates high confidentiality impact, but this conflicts with Chromium's own 'Low' severity assignment - the gap likely reflects that the practical scope of information leakage via SVG side-channels is constrained by modern browser isolation mitigations. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: Chrome 153.0.8010.36. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-87620 vulnerability details – vuln.today

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