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PatchSiren cyber security CVE debrief

CVE-2026-54105 U.S. Government Accountability Office CVE debrief

The U.S. Government Accountability Office (GAO) Electronic Protest Docketing System (EPDS) and Civilian Board of Contract Appeals (CBCA) Electronic Docketing System (EDS) are vulnerable to sensitive account information exposure. A remote, unauthenticated attacker can exploit this vulnerability by submitting a request with an arbitrary 'user_id' parameter to the 'update-profile/' API endpoint, receiving a JSON response containing account-specific information, including the associated email address. This medium-severity vulnerability, with a CVSS score of 6.9, requires immediate attention from government agencies and contractors using these systems. The vulnerability was publicly disclosed on June 18, 2026. Affected organizations should take prompt action to mitigate this risk.

Vendor
U.S. Government Accountability Office
Product
Electronic Protest Docketing System (EPDS)
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-18
Original CVE updated
2026-06-18
Advisory published
2026-06-18
Advisory updated
2026-06-18

Who should care

Government agencies, contractors, and organizations using the GAO Electronic Protest Docketing System (EPDS) and Civilian Board of Contract Appeals (CBCA) Electronic Docketing System (EDS) should be aware of this vulnerability and take necessary precautions to protect sensitive account information.

Technical summary

The vulnerability exists in the 'update-profile/' API endpoint of both EPDS and EDS systems. An unauthenticated attacker can submit a request with an arbitrary 'user_id' parameter and receive a JSON response containing sensitive account information, including email addresses. The CVSS:4.0 vector for this vulnerability is AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. This vulnerability is classified under CWE-639.

Defensive priority

High

Recommended defensive actions

  • Immediately apply patches or updates to the EPDS and EDS systems to fix the vulnerable 'update-profile/' API endpoint.
  • Implement proper authentication and authorization mechanisms for API endpoints handling sensitive information.
  • Conduct thorough security audits and penetration testing to identify similar vulnerabilities.
  • Restrict access to sensitive API endpoints using IP whitelisting or VPN.
  • Monitor API endpoint logs for suspicious activity and implement rate limiting.
  • Develop and implement a comprehensive incident response plan.
  • Provide security awareness training to developers and administrators handling sensitive systems.

Evidence notes

The information provided is based on data from the National Vulnerability Database (NVD) and the CVE.org record. The vulnerability was publicly disclosed on June 18, 2026. The accuracy of this information relies on the credibility of these sources.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-54105 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-54105

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

  • CVE-2026-54105 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-54105

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

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://epds.gao.gov/

    9119a7d8-5eab-497f-8521-727c672e3725

  • Source reference

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-01.json

    9119a7d8-5eab-497f-8521-727c672e3725

  • Source reference

    Unverified legacy reference

    URL: https://www.eds.cbca.gov/login

    9119a7d8-5eab-497f-8521-727c672e3725

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.