Is CVE-2026-119561 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-119561 being exploited in the wild.

How severe is CVE-2026-119561?

Medium severity, with a CVSS score of 6.8, published 30 October 2026.

Which products and versions are affected?

phpMyAdmin 5.2.3 (default tarball without web-auth/webauthn-lib).

Is there a fix for CVE-2026-119561?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-119561 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-119561?

Check whether you run phpMyAdmin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-119561: phpMyAdmin WebAuthn signature verification bypass in CustomServer

CVE-2026-119561 · Severity: medium · CVSS 6.8 · Published 2026-10-30

phpMyAdmin is a web application that lets administrators manage MySQL databases through a browser interface. This vulnerability affects the optional two-factor authentication feature: an attacker who has already obtained a victim's MySQL login credentials can bypass the WebAuthn second factor by submitting a forged authentication response with a fake signature. This grants complete access to the database.

Technologies: phpMyAdmin. Vendors: phpMyAdmin.

Quick answers

Is CVE-2026-119561 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-119561 being exploited in the wild.
How severe is CVE-2026-119561?: Medium severity, with a CVSS score of 6.8, published 30 October 2026.
Which products and versions are affected?: phpMyAdmin 5.2.3 (default tarball without web-auth/webauthn-lib).
Is there a fix for CVE-2026-119561?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-119561 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-119561?: Check whether you run phpMyAdmin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability exists in phpMyAdmin 5.2.3's CustomServer::parseAndValidateAssertionResponse() method, which validates WebAuthn assertions but never verifies the cryptographic signature against stored public keys. An attacker with valid MySQL credentials can POST a crafted webauthn_request_response containing a matching challenge, origin, rpIdHash, and user-present flag but with an invalid or fake signature to bypass 2FA. This occurs only when the optional web-auth/webauthn-lib dependency is not installed; installations with that library use WebauthnLibServer instead and are not affected.

Affected products

phpMyAdmin phpMyAdmin 5.2.3 (default tarball without web-auth/webauthn-lib)

Timeline

2026-09-20: disclosed
2026-10-30: advisory
2026-10-30: other: Published with CVE-2026-119561

References

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