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CVE-2026-23955— EVerest vulnerable to concatenation of strings literal and integers

Quick assessment

Affected
EVerest everest-core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

everest-core是EVerest开源的一个电动汽车充电软件堆栈的主要部分。 everest-core 2025.9.0之前版本存在安全漏洞，该漏洞源于在抛出错误时将整数值与字符串字面量连接，可能导致读取意外内存区域。

CVSS 4.2 · Medium EPSS 0.19% · P8
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I. Basic Information for CVE-2026-23955

Vulnerability Information
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Vulnerability Title
EVerest vulnerable to concatenation of strings literal and integers
Source: CVE Program / CVE List V5
Vulnerability Description
EVerest is an EV charging software stack. Prior to version 2025.9.0, in several places, integer values are concatenated to literal strings when throwing errors. This results in pointers arithmetic instead of printing the integer value as expected, like most of interpreted languages. This can be used by malicious operator to read unintended memory regions, including the heap and the stack. Version 2025.9.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用字符串连接创建不可变文本
Source: CVE Program / CVE List V5
Vulnerability Title
everest-core 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
everest-core是EVerest开源的一个电动汽车充电软件堆栈的主要部分。 everest-core 2025.9.0之前版本存在安全漏洞，该漏洞源于在抛出错误时将整数值与字符串字面量连接，可能导致读取意外内存区域。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
EVerest everest-core < 2025.9.0 -

II. Public POCs for CVE-2026-23955

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III. Intelligence Information for CVE-2026-23955

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Vendor Advisories for CVE-2026-23955 (1)

Same Patch Batch · EVerest · 2026-01-21 · 11 CVEs total

CVE-2025-68137 8.4 HIGH EVerest's Integer Overflow and Signed to Unsigned conversion lead to either stack buffer o
CVE-2025-68133 7.4 HIGH EVerest's unlimited connections can lead to DoS through operating system resource exhausti
CVE-2025-68134 7.4 HIGH EVerest's use of assert functions can potentially lead to denial of service
CVE-2025-68136 7.4 HIGH EVerest's inadequate session handling can lead to memory-related errors or exhaustion of t
CVE-2025-68141 7.4 HIGH EVerest vulnerable to null pointer dereference during DC_ChargeLoopRes document deserializ
CVE-2025-68135 6.5 MEDIUM EVerest's inadequate exception handling leads to denial of service
CVE-2025-68138 4.7 MEDIUM EVerest affected by memory exhaustion in libocpp
CVE-2025-68139 4.3 MEDIUM In EVerest, by default, the EV is responsible for closing the connection if the module enc
CVE-2025-68140 4.3 MEDIUM EVerest allows null session ID to bypass session ID verification
CVE-2025-68132 EVerest has out-of-bounds read in DZG_GSH01 SLIP CRC parser that can crash powermeter driv

IV. Related Vulnerabilities

Same product: everest-core
Same vendor: EVerest

V. Comments for CVE-2026-23955

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