Security readout for executives and security teams
Plain-English summary
OpenEMR versions before 8.0.0 let an authenticated patient portal user overwrite provider signatures. In a healthcare setting, this creates risk of forged medical documents, compliance failures, and fraud. The issue is fixed in OpenEMR 8.0.0.
Executive priority
Treat as high priority for healthcare environments using OpenEMR. The main business risk is document integrity and regulatory trust, not system outage. Upgrade planning should be prompt.
Technical view
CVE-2026-24890 is an authorization bypass in OpenEMR’s patient portal signature functionality. A low-privileged authenticated portal user could modify provider signature data without proper authorization checks. CVSS is 8.1 High, with network access, low complexity, and high confidentiality and integrity impact.
Likely exposure
Organizations running OpenEMR before 8.0.0 are potentially exposed, especially if patient portal accounts are enabled. The vulnerability requires authenticated portal access, not anonymous access.
Exploitation context
The provided sources do not show active exploitation, KEV listing, or public exploit availability. Abuse would require a valid portal user account and could affect trust in provider-signed records.
Researcher notes
Evidence is limited to the CVE record, GitHub advisory, and fixing commit. The root issue is missing authorization enforcement for provider signature modification by portal users. Do not assume compromise without logs or supporting evidence.
Mitigation direction
- Upgrade OpenEMR to version 8.0.0 or later.
- Review the GitHub security advisory for vendor guidance.
- Assess whether provider signatures were changed unexpectedly before upgrade.
- Preserve relevant logs if suspicious signature activity is found.
Validation and detection
- Inventory OpenEMR instances and confirm version numbers.
- Identify any OpenEMR deployment below version 8.0.0.
- Confirm whether patient portal accounts are enabled.
- Review audit records for unexpected provider signature updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-285: Exact CWE lookup
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Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-24890 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N2.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/openemr/openemr/security/advisories/GHSA-xc8x-mfh8-9xvhCVE reference · x_refsource_CONFIRM
- https://github.com/openemr/openemr/commit/a29c0f7ac0975429a85cd09a3ff12ee0dcdb4478CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.