What is CVE-2026-50157?

CVE-2026-50157 is a medium-severity vulnerability in Auth0 Symfony, classified under CWE-598. CVSS score: 6.5/10. Published 2026-09-14.

How severe is CVE-2026-50157?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Auth0 Symfony

CVE-2026-50157

Auth0 Symfony is a Symfony SDK for Auth0 Authentication and Management APIs. From 5.0.0-BETA0 until 5.9.0, the Authorizer::authenticate() and Authorizer::supports() paths in the Authorizer security authenticator may accept OAuth 2.0 bearer access tokens from the token URL query parameter as well as the Authorization header for protected HTTP routes. Query-string tokens can be recorded in server logs, browser history, or referrer data and then replayed against protected API endpoints. This issue is fixed in version 5.9.0.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Auth0 Symfony — versions >= 5.0.0-BETA0, < 5.9.0

Weakness classification (CWE)

CWE-598

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-50157?: CVE-2026-50157 is a medium-severity vulnerability in Auth0 Symfony, classified under CWE-598. CVSS score: 6.5/10. Published 2026-09-14.
How severe is CVE-2026-50157?: Medium severity. CVSS v3 base score is 6.5 out of 10.