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

June 15, 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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