GHSA-ffq7-hh2j-r24p: auth0/symfony (CVE-2026-50157)

Package	Ecosystem	Affected	Fixed in
auth0/symfony	Packagist	>=5.0.0-BETA0, <5.9.0	5.9.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The auth0/symfony package, versions 5.0.0-BETA0 up to 5.9.0 (not including 5.9.0), accepts OAuth 2.0 bearer access tokens passed as a URL query parameter in addition to the Authorization header when the Authorizer security authenticator protects HTTP routes. The source does not describe the attacker's position or prerequisites, but the issue may increase the risk of access token exposure and replay against protected API endpoints. Upgrade auth0/symfony to version 5.9.0 or greater.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0051, the 43rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:24 UTC First seen by agentprime
31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.