CVE-2026-27815 MEDIUM

CVE-2026-27815: EVerest: ISO15118 session_setup payment options overflow can corrupt EVSE state

Vendor Everest
Product everest-core
Weakness CWE-787
Published March 26, 2026
Last update March 28, 2026
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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 validation disabled by default, oversized MQTT Cmd payloads can trigger out-of-bounds writes and corrupt adjacent EVSE state or crash the process. Version 2026.02.0 contains a patch.

Key dates

02Disclosure timeline

March 26, 2026 CVE published
March 28, 2026 Record updated