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CVE-2026-8560 Google CVE debrief

A heap buffer overflow vulnerability in SwiftShader, Google's software-based graphics rendering library used in Chrome, could allow remote attackers to perform out-of-bounds memory reads via crafted HTML pages. The vulnerability affects Google Chrome on macOS and iOS platforms prior to version 148.0.7778.168. SwiftShader serves as a fallback graphics renderer when hardware acceleration is unavailable, making this vulnerability exploitable through browser-based attack vectors without requiring elevated privileges. The CVSS 3.1 score of 4.3 (Medium severity) reflects the need for user interaction and the limited confidentiality impact, with no integrity or availability impact. The vulnerability was disclosed on May 14, 2026, with the NVD record subsequently modified on May 19, 2026. Google has addressed this issue in Chrome stable channel updates.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-14
Original CVE updated
2026-05-19
Advisory published
2026-05-14
Advisory updated
2026-05-19

Who should care

Organizations with macOS and iOS endpoints running Google Chrome, particularly those in environments where hardware graphics acceleration may be disabled or unavailable. Security teams managing browser update cadences and those concerned with information disclosure vulnerabilities in rendering engines. Organizations with strict data loss prevention requirements where memory content exposure poses compliance risks.

Technical summary

The vulnerability exists in SwiftShader, Google's CPU-based implementation of the Vulkan and OpenGL ES graphics APIs used as a fallback renderer in Chrome. A heap buffer overflow condition allows out-of-bounds memory reads when processing crafted HTML content. The attack vector requires network access and user interaction (rendering a malicious page), with successful exploitation potentially exposing limited memory contents. The vulnerability does not permit code execution or system modification based on the CVSS impact metrics. SwiftShader operates in a sandboxed renderer process, providing defense-in-depth against exploitation escalation.

Defensive priority

medium

Recommended defensive actions

  • Update Google Chrome to version 148.0.7778.168 or later on macOS and iOS systems
  • Verify SwiftShader is not forcibly enabled via command-line flags on unmanaged endpoints
  • Monitor for unusual renderer process crashes that may indicate exploitation attempts
  • Apply principle of least privilege for browser processes where technically feasible
  • Review web content filtering policies to reduce exposure to untrusted HTML content

Evidence notes

CVE description confirms heap buffer overflow in SwiftShader component. CPE data indicates affected product as Google Chrome with version bound prior to 148.0.7778.168. CVSS vector AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N supports network attack vector requiring user interaction. CWE-122 (Heap-based Buffer Overflow) identified in source metadata. Vendor advisory from Chrome Releases blog confirms fix availability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-8560 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-8560

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-8560 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-8560

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.