What is CVE-2026-27815?

CVE-2026-27815 is a critical-severity vulnerability in Everest Everest-core, classified under Out-of-bounds Write. CVSS score: 9.1/10. Published 2026-03-26.

How severe is CVE-2026-27815?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Buffer overflow in Everest Everest-core

CVE-2026-27815

EVerest is an EV charging software stack. Prior to versions to 2026.02.0, ISO15118_chargerImpl::handle_session_setup copies a variable-length payment_options list into a fixed-size array of length 2 without bounds checking. With schema val…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (19.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Everest Everest-core — versions < 2026.02.0
Linuxfoundation Everest

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-27815?: CVE-2026-27815 is a critical-severity vulnerability in Everest Everest-core, classified under Out-of-bounds Write. CVSS score: 9.1/10. Published 2026-03-26.
How severe is CVE-2026-27815?: Critical severity. CVSS v3 base score is 9.1 out of 10.