PatchSiren cyber security CVE debrief

CVE-2026-20791 Chargemap CVE debrief

CVE-2026-20791 is a medium-severity information exposure issue in Chargemap/chargemap.com where charging station authentication identifiers were publicly accessible through web-based mapping platforms. The advisory does not describe active exploitation, but exposure of authentication-related identifiers can create avoidable risk and should be treated as a prompt access-control and data-exposure review item.

Vendor: Chargemap
Product: Unknown
CVSS: MEDIUM 6.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-02-26
Original CVE updated: 2026-02-26
Advisory published: 2026-02-26
Advisory updated: 2026-02-26

Who should care

Chargemap operators, EV charging station owners and administrators, teams integrating with Chargemap data or map views, and security teams responsible for public web services and exposed identifiers.

Technical summary

According to the CISA CSAF advisory, charging station authentication identifiers were publicly accessible via web-based mapping platforms. The source frames this as an exposure problem rather than a code-execution flaw: the main issue is that sensitive identifiers were available to unauthenticated users. The advisory does not provide exploit details or confirm downstream compromise, so defenders should focus on limiting exposure, assessing whether the identifiers are sensitive, and reviewing any systems that rely on them.

Defensive priority

Medium. The issue is publicly reachable and involves authentication-related identifiers, so it merits prompt triage and remediation even though the advisory does not report confirmed exploitation.

Recommended defensive actions

Identify any public web pages, APIs, or map views that expose authentication identifiers or similar sensitive fields.
Remove unnecessary identifier fields from public responses and restrict access to authorized users only.
If any exposed identifiers function as secrets or can be used for authentication, invalidate or rotate them.
Review access logs and monitoring for unusual access patterns involving the affected data.
Coordinate with Chargemap support using the vendor contact page and document any affected assets or integrations.

Evidence notes

The source corpus is a CISA CSAF advisory (ICSA-26-057-05) published on 2026-02-26 with the description that charging station authentication identifiers are publicly accessible via web-based mapping platforms. The advisory notes SSVCv2/E:N/A:Y/2026-02-25T07:00:00.000000Z and includes remediation guidance pointing to Chargemap support because Chargemap did not respond to CISA's coordination request. No exploit code, confirmed intrusion, or ransomware association is provided in the supplied sources.

Official resources

CISA first published the advisory on 2026-02-26. The source corpus indicates that Chargemap did not respond to CISA's coordination request.