CVE-2026-27815: EVerest is an EV charging software stack

Q: How do I fix CVE-2026-27815?

everest: upgrade to 2026.02.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-27815 being exploited?

CVE-2026-27815 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-27815 affect?

CVE-2026-27815 affects everest. Severity is critical (CVSS 9.1). 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 vali

Q: How urgent is CVE-2026-27815?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This month

CRITICAL 9.1REMOTEWATCHLISTUPGRADE

CVE-2026-27815 is a critical-severity flaw (CVSS 9.1) affecting everest. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 17:16 UTCPublished CVE record published
2026-06-17 10:27 UTCUpdated Record last modified

linuxfoundation everest UPGRADE

Affected: < 2026.02.0

Fixed in: 2026.02.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27815?

everest: upgrade to 2026.02.0. Exact commands for each OS are on this page.

Is CVE-2026-27815 being exploited?

CVE-2026-27815 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27815 affect?

CVE-2026-27815 affects everest. Severity is critical (CVSS 9.1). 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 vali

How urgent is CVE-2026-27815?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2026-33015 MEDIUM 5.2 UPGRADE EVerest is an EV charging software stack
CVE-2026-33014 MEDIUM 5.2 UPGRADE EVerest is an EV charging software stack
CVE-2026-33009 HIGH 8.2 UPGRADE EVerest is an EV charging software stack
CVE-2026-29044 MEDIUM 5.0 UPGRADE EVerest is an EV charging software stack
CVE-2026-27828 HIGH 7.5 UPGRADE EVerest is an EV charging software stack

References

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