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CVE-2026-34236

Auth0 Auth0-php vulnerability

8.2 HIGHEPSS 0.32%
  1. Published1 Apr 2026

Description

Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies. This issue has been patched in version 8.19.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

Auth0 Auth0-php≥ 8.0.0 < 8.19.0

Remediation

Fixed in
Auth0 Auth0-php≥ 8.19.0

References

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Frequently asked

Is CVE-2026-34236 being actively exploited?

CVE-2026-34236 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.32%.

How severe is CVE-2026-34236?

CVE-2026-34236 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.32% probability of exploitation.

Which products are affected by CVE-2026-34236?

Affected products include Auth0 Auth0-php.

How do I fix CVE-2026-34236?

Upgrade affected software to a fixed version, for example Auth0 Auth0-php 8.19.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-34236 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.