How severe is CVE-2026-50157?

CVE-2026-50157 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-50157 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-50157?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-50157 published?

CVE-2026-50157 was published on 2026-09-14 and last updated on 2026-09-30.

CVE-2026-50157

CVE-2026-50157 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-598.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-598
Published: 2026-09-14
Last modified: 2026-09-30

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-50157?: CVE-2026-50157 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-50157 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-50157?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-50157 published?: CVE-2026-50157 was published on 2026-09-14 and last updated on 2026-09-30.

References

Other CWE-598 vulnerabilities

CVE-2026-76179 — Critical (CVSS 9.8): An improper protection of authentication tokens vulnerability exists in certain Ebyte gateway products. Authentication…
CVE-2026-74880 — Critical (CVSS 9.8): openssl_encrypt versions before 1.4.0 accept refresh tokens as URL query parameters in keyserver and telemetry server…
CVE-2025-69270 — Critical (CVSS 9.8): Information Exposure Through Query Strings in GET Request vulnerability in Broadcom DX NetOps Spectrum on Windows,…
CVE-2023-6014 — Critical (CVSS 9.8): An attacker is able to arbitrarily create an account in MLflow bypassing any authentication requirment.
CVE-2025-56551 — High (CVSS 8.2): An issue in DirectAdmin v1.680 allows unauthorized attackers to manipulate the page layout and replace the legitimate…
CVE-2021-21594 — High (CVSS 8.2): Dell PowerScale OneFS versions 8.2.2 - 9.1.0.x contain a use of get request method with sensitive query strings…

Browse all CWE-598 vulnerabilities →