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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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-20791 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-20791

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-20791 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-20791

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-057-05.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-05

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.