PatchSiren cyber security CVE debrief

CVE-2026-8915 Samsung Open Source CVE debrief

CVE-2026-8915 is a high-severity out-of-bounds write vulnerability in Samsung Open Source Escargot, a JavaScript engine. The vulnerability allows for buffer overflow conditions and affects commit 36f5fb58366a67b713c02f6fd985e924fcc09e31. The CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates network attack vector with low complexity, no privileges required, user interaction required, and high impacts to confidentiality, integrity, and availability. The vulnerability is classified as CWE-787 (Out-of-bounds Write). A pull request (#1579) has been submitted to address this issue. As of publication, the CVE status is 'Undergoing Analysis' per NVD. No known exploitation in the wild or ransomware campaign use has been documented.

Vendor: Samsung Open Source
Product: Escargot
CVSS: HIGH 8.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-05-28
Original CVE updated: 2026-05-28
Advisory published: 2026-05-28
Advisory updated: 2026-05-28

Who should care

Organizations using Samsung Escargot JavaScript engine in production environments, particularly those processing untrusted JavaScript code. Developers embedding Escargot in applications, IoT devices, or embedded systems. Security teams responsible for JavaScript engine supply chain security.

Technical summary

Out-of-bounds write (CWE-787) in Samsung Open Source Escargot JavaScript engine affecting commit 36f5fb58366a67b713c02f6fd985e924fcc09e31. Network-accessible attack vector with user interaction required. High impact to confidentiality, integrity, and availability. Remediation via GitHub PR #1579.

Defensive priority

HIGH

Recommended defensive actions

Review and apply pull request #1579 when merged to address the out-of-bounds write vulnerability
Identify systems running Escargot commit 36f5fb58366a67b713c02f6fd985e924fcc09e31 or earlier
Monitor Samsung Escargot repository for official release containing the security fix
Implement input validation and sandboxing for JavaScript execution environments where Escargot is deployed
Subscribe to Samsung PSIRT advisories for updated remediation guidance

Evidence notes

Vulnerability confirmed via official CVE.org record and NVD entry. Affected version identified as specific Git commit 36f5fb58366a67b713c02f6fd985e924fcc09e31. Remediation reference identified via Samsung PSIRT-submitted GitHub pull request.

Official resources

2026-05-28