CVE-2026-27815 | EVerest everest-core 2025.9.0/2025.10.0/2025.12.0 handle_session_setup out-of-bounds write (GHSA-7wmg-crc8-6xxf)

VDB-353676 · CVE-2026-27815 · GHSA-7WMG-CRC8-6XXF EVEREST EVEREST-CORE 2025.9.0/2025.10.0/2025.12.0 HANDLE_SESSION_SETUP OUT-OF-BOUNDS WRITE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.0 $0-$5k 2.18+ Summaryinfo A vulnerability categorized as critical has been discovered in EVerest everest-core. This issue affects the function ISO15118_chargerImpl::handle_session_setup. The manipulation results in out-of-bounds write. This vulnerability is identified as CVE-2026-27815. The attack is only possible with local access. There is not any exploit available. It is advisable to upgrade the affected component. Detailsinfo A vulnerability, which was classified as critical, was found in EVerest everest-core. Affected is the function ISO15118_chargerImpl::handle_session_setup. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes: 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. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-27815 since 02/24/2026. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. Upgrading to version 2026.02.0 eliminates this vulnerability. Productinfo Vendor EVerest Name everest-core Version 2025.9.0 2025.10.0 2025.12.0 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 7.0 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Out-of-bounds write CWE: CWE-787 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: everest-core 2026.02.0 Timelineinfo 02/24/2026 CVE reserved 03/26/2026 +30 days Advisory disclosed 03/26/2026 +0 days VulDB entry created 03/26/2026 +0 days VulDB entry last update Sourcesinfo Advisory: GHSA-7wmg-crc8-6xxf Status: Confirmed CVE: CVE-2026-27815 (🔒) GCVE (CVE): GCVE-0-2026-27815 GCVE (VulDB): GCVE-100-353676 Entryinfo Created: 03/26/2026 19:00 Changes: 03/26/2026 19:00 (68) Complete: 🔍 Cache ID: 99:F79:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸