# CVE-2026-2991: Auth bypass in KiviCare – Clinic & Patient Management System (EHR)

> Unauthenticated attackers can bypass authentication to access patient medical records and potentially administrator cookies by exploiting a missing token verification in the social login function.

- **Severity:** High 7.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Mar 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-vgm8-mf6q-65v2

## What is CVE-2026-2991?

CVE-2026-2991 is a high-severity authentication bypass vulnerability in iqonicdesign KiviCare – Clinic & Patient Management System (EHR), published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The KiviCare – Clinic & Patient Management System (EHR) plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 4.1.2. This is due to the `patientSocialLogin()` function not verifying the social provider access token before authenticating a user. This makes it possible for unauthenticated attackers to log in as any patient registered on the system by providing only their email address and an arbitrary value for the access token, bypassing all credential verification. The attacker gains access to sensitive medical records, appointments, prescriptions, and billing information (PII/PHI breach). Additionally, authentication cookies are set before the role check, meaning the auth cookies for non-patient users (including administrators) are also set in the HTTP response headers, even though a 403 response is returned.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-2991?


## How do I fix CVE-2026-2991?

No fix has been published for CVE-2026-2991 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2991 being exploited?

There is no known exploitation of CVE-2026-2991 in the wild and no public exploit code.

Public exploit code:

- PoC exploit for CVE-2026-2991 — authentication bypass in KiviCare WordPress plugin (≤4.1.2) allowing unauthenticated patient account takeover and admin session extraction. (github_poc): https://github.com/joshuavanderpoll/CVE-2026-2991

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2991 and fix it if it is affected.

What it is: CVE-2026-2991 is a high-severity authentication bypass vulnerability in iqonicdesign KiviCare – Clinic & Patient Management System (EHR), published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-2991 in the wild and no public exploit code.

Affected product: iqonicdesign KiviCare – Clinic & Patient Management System (EHR). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-2991/ (Markdown: https://insights.sbomify.com/CVE-2026-2991/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2991
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2991
- OSV: https://osv.dev/vulnerability/CVE-2026-2991

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-2991/
Summaries are generated and may contain mistakes; the official description above is the record.