# CVE-2026-5229: Auth bypass in Receive Notifications After Form Submitting – Form Notify for Any Forms

> Unauthenticated attackers can bypass authentication and take over any user account, including administrators, by manipulating LINE OAuth cookies.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 May 2026
- **Updated:** 15 May 2026
- **Also known as:** GHSA-6cpv-j32f-rqmr

## What is CVE-2026-5229?

CVE-2026-5229 is a critical authentication bypass vulnerability in m615926 Receive Notifications After Form Submitting – Form Notify for Any Forms, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Form Notify plugin for WordPress is vulnerable to Authentication Bypass in versions up to and including 1.1.10. This is due to the plugin trusting user-controlled cookie data to determine which WordPress account to authenticate after a LINE OAuth login. When LINE doesn't provide an email address (which is common), the plugin falls back to reading the 'form_notify_line_email' cookie value without verifying that the LINE account is associated with that email address. This makes it possible for unauthenticated attackers to gain access to any user account on the site, including administrator accounts, by completing a LINE OAuth flow with their own LINE account while injecting a malicious cookie containing the target victim's email address.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-5229?


## How do I fix CVE-2026-5229?

No fix has been published for CVE-2026-5229 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5229 being exploited?

There is no known exploitation of CVE-2026-5229 in the wild and no public exploit code.

Public exploit code:

- CVE-2026-5229: Form Notify Auth Bypass via LINE OAuth Callback (CVSS 9.8) (github_poc): https://github.com/xxconi/CVE-2026-5229

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5229 and fix it if it is affected.

What it is: CVE-2026-5229 is a critical authentication bypass vulnerability in m615926 Receive Notifications After Form Submitting – Form Notify for Any Forms, published on 15 May 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-2026-5229 in the wild and no public exploit code.

Affected product: m615926 Receive Notifications After Form Submitting – Form Notify for Any Forms. 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-2026-5229/ (Markdown: https://insights.sbomify.com/CVE-2026-5229/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5229
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5229
- OSV: https://osv.dev/vulnerability/CVE-2026-5229

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-5229/
Summaries are generated and may contain mistakes; the official description above is the record.