Security Resilience

CVE-2026-21443

Open-Emr Openemr ≤ 8.0.0

Published
25 February 2026
Modified
26 February 2026
Patch / advisory
View advisory
CVSS Score v4 1.2
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/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
EPSS Score 0.0017 6th percentile
Risk Priority 15 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-21443 is a low-severity Improper Encoding or Escaping of Output (CWE-116) vulnerability in Open-Emr Openemr. Its CVSS base score is 1.2 (Low).

Operationally, ranked at the 6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0, the `xl()` translation function returns unescaped strings. While wrapper functions exist for escaping in different contexts (`xlt()` for HTML, `xla()` for…

more

attributes, `xlj()` for JavaScript), there are places in the codebase where `xl()` output is used directly without escaping. If an attacker could insert malicious content into the translation database, these unescaped outputs could lead to XSS. Version 8.0.0 fixes the issue.

CWE(s)
CWE-116

Related Threats

CVEs Like This One

CVE-2026-33301Same product: Open-Emr Openemr
CVE-2026-32123Same product: Open-Emr Openemr
CVE-2026-33934Same product: Open-Emr Openemr
CVE-2025-32967Same product: Open-Emr Openemr
CVE-2026-33914Same product: Open-Emr Openemr
CVE-2026-32125Same product: Open-Emr Openemr
CVE-2025-67752Same product: Open-Emr Openemr
CVE-2026-24488Same product: Open-Emr Openemr
CVE-2026-33932Same product: Open-Emr Openemr
CVE-2026-32122Same product: Open-Emr Openemr

Affected Assets

open-emr
openemr
≤ 8.0.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-15 Information Output Filtering
addresses: CWE-116

Validating that output matches expected content directly mitigates failures to properly encode or escape data for its destination context.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect missing or incorrect encoding but does not itself implement the control.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly require correct output encoding and escaping to preserve message structure.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-116, a class-level weakness, and none of its children carries one either.

References