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EUVD-2026-199713

fkie_cve-2023-36829

Sentry is an error tracking and performance monitoring platform. Starting in version 23.6.0 and prior to version 23.6.2, the Sentry API incorrectly returns the `access-control-allow-credentials: true` HTTP header if the `Origin` request header ends with the `system.base-hostname` option of Sentry installation. This only affects installations that have `system.base-hostname` option explicitly set, as it is empty by default. Impact is limited since recent versions of major browsers have cross-site cookie blocking enabled by default. However, this flaw could allow other multi-step attacks. The patch has been released in Sentry 23.6.2.

GHSA-4xqm-4p72-87h6 — Sentry CORS misconfiguration

Affected: PyPI: sentry

### Impact The Sentry API incorrectly returns the `access-control-allow-credentials: true` HTTP header if the `Origin` request header ends with the `system.base-hostname` option of Sentry installation. This only affects installations that have `system.base-hostname` option explicitly set, as it is empty by default.

Impact is limited since recent versions of major browsers have cross-site cookie blocking enabled by default. However, this flaw could allow other multi-step attacks.

### Patches The patch has been released in [Sentry 23.6.2](https://github.com/getsentry/self-hosted/releases/tag/23.6.2).

### Workarounds

For Sentry SaaS customers, no action is needed.

For self-hosted Sentry installations that have `system.base-hostname` explicitly set, it is recommended to upgrade the installation to 23.6.2 or higher. There are no known workarounds.

### References - [getsentry/sentry PR #52276](https://github.com/getsentry/sentry/pull/52276)

### Credits - [@andr0idp4r4n0id](https://twitter.com/andr0idp4r4n0id)

gsd-2023-36829

PYSEC-2023-115

Affected: PyPI: sentry