# CVE-2026-119561: phpMyAdmin through 5.2.3 WebAuthn Two-Factor Authentication Bypass via CustomServer


- **Severity:** High 7.6 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 30 Oct 2026
- **Updated:** 30 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-119561, GHSA-hmm7-jqq6-vwhr, UBUNTU-CVE-2026-119561

## What is CVE-2026-119561?

CVE-2026-119561 is a high-severity vulnerability in phpMyAdmin, published on 30 Oct 2026. 

### Official description

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2026-119561?

It affects 1 product.


Products: phpMyAdmin.

## How do I fix CVE-2026-119561?

No fix has been published for CVE-2026-119561 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-119561 being exploited?

There is no known exploitation of CVE-2026-119561 in the wild and no public exploit code.

## Other vulnerabilities in phpMyAdmin

- [CVE-2008-7251](https://insights.sbomify.com/CVE-2008-7251/): libraries/File.class.php in phpMyAdmin 2.11.x before 2.11.10 creates a temporary directory with 0777 permissions, which has unknown impact and attack vectors. (critical 10.0)
- [CVE-2008-7252](https://insights.sbomify.com/CVE-2008-7252/): phpMyAdmin unsafely handles temporary files (critical 10.0)
- [CVE-2007-0203](https://insights.sbomify.com/CVE-2007-0203/): Multiple unspecified vulnerabilities in phpMyAdmin before 2.9.2-rc1 have unknown impact and attack vectors. (critical 10.0)
- [CVE-2004-1147](https://insights.sbomify.com/CVE-2004-1147/): phpMyAdmin 2.6.0-pl2, and other versions before 2.6.1, with external transformations enabled, allows remote attackers to execute arbitrary c (critical 10.0)
- [CVE-2020-22452](https://insights.sbomify.com/CVE-2020-22452/): phpmyadmin contains SQL Injection vulnerability (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-119561 and fix it if it is affected.

What it is: CVE-2026-119561 is a high-severity vulnerability in phpMyAdmin, published on 30 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-119561 in the wild and no public exploit code.

Affected product: phpMyAdmin. 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-2026-119561/ (Markdown: https://insights.sbomify.com/CVE-2026-119561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-119561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119561
- OSV: https://osv.dev/vulnerability/CVE-2026-119561

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-119561/
Summaries are generated and may contain mistakes; the official description above is the record.