CVE-2026-27828Network attack vector

EVSE process crash via freed session context

Published Mar 26, 2026 · Updated Mar 26, 2026

Use-after-free in EVerest Core before 2026.02.0 allows attackers with MQTT access to crash the EVSE process remotely. After ISO 15118 initialization fails, EvseV2G frees v2g_ctx but leaves MQTT command handlers active, so handle_session_setup dereferences the released context. The crash requires a failed ISO 15118 startup, such as a missing IPv6 link-local address, followed by a session_setup command from an MQTT-connected attacker.

CVSS severity7.5
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in EVerest Core before 2026.02.0 allows attackers with MQTT access to crash the EVSE process remotely. After ISO 15118 initialization fails, EvseV2G frees v2g_ctx but leaves MQTT command handlers active, so handle_session_setup dereferences the released context. The crash requires a failed ISO 15118 startup, such as a missing IPv6 link-local address, followed by a session_setup command from an MQTT-connected attacker.

The record

CVE
CVE-2026-27828
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
EVerest
Product
EVerest Core
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2026.02.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

EVerest · EVerest Coreversion=< 2026.02.0

Published CVSS scores

5.5GitHub, Inc.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
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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