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🛡️ CVE-2026-34236 — auth0-php

🟠 CVSS 8.2 — High ✅ No Known Exploit CWE-331 NVD
8.2
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Auth0 PHP SDK has Insufficient Entropy in Cookie Encryption

Impact

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.

Am I Affected?

Consumers are affected if their application meets the following preconditions:

  • Their application is using the Auth0-PHP SDK, versions between 8.0.0 and 8.18.0
  • Their application is using the Auth0-PHP SDK, or the following SDKs that rely on the Auth0-PHP SDK:
  • Auth0/symfony,
  • Auth0/laravel0-auth0, or
  • Auth0/wordpress

Resolution

Upgrade Auth0/Auth0-PHP to version 8.19.0 or greater.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Changed — a successful attack reaches components beyond the vulnerable one.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: None.

Weakness class

CVE-2026-34236 is classified as CWE-331: Insufficient Entropy. A generator is seeded with too little randomness, narrowing the range of outputs an attacker must search.

Affected software

CVE-2026-34236 is recorded against 2 packages.

  • auth0-php (from 8.0.0 up to 8.19.0)
  • auth0/auth0-php (from 8.0.0 up to 8.19.0)

Timeline and source

Published on 1 April 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com

Other advisories for this package

auth0-php has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-331: Insufficient Entropy) in other software:

Details

Severity HIGH
CVSS Score 8.2
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE CWE-331
Public Exploit ✅ No
Source NVD
Published 2026-04-01
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
auth0-php 8.0.0 8.19.0
auth0/auth0-php 8.0.0 8.19.0

Similar Threats

Site Security Check

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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