CVE-2026-54257: Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow

June 15, 2026 (updated July 20, 2026)

Most apps will crash and some may perform incorrect buffer allocations in the Node.js Buffer API resulting in unexpected truncation or allocation.

References

github.com/advisories/GHSA-q6m5-f73j-m9mc
github.com/electron/electron/security/advisories/GHSA-q6m5-f73j-m9mc
nvd.nist.gov/vuln/detail/CVE-2026-54257

Code Behaviors & Features

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