---
id: CVE-2023-36829
aliases:
  - GHSA-4xqm-4p72-87h6
  - PYSEC-2023-115
title: Sentry CORS misconfiguration
summary: Sentry CORS misconfiguration
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'
vendor: sentry
product: sentry
ecosystem: pip
affected:
  - 'sentry >= 23.6.0, < 23.6.2'
patched:
  - sentry 23.6.2
published: '2023-07-06'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:08.444402599Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-4xqm-4p72-87h6'
references:
  - url: >-
      https://github.com/getsentry/sentry/security/advisories/GHSA-4xqm-4p72-87h6
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-36829'
  - url: 'https://github.com/getsentry/sentry/pull/52276'
  - url: >-
      https://github.com/getsentry/sentry/commit/19248fb9802c252665b802aeab02fdc65ed47dc9
  - url: >-
      https://github.com/getsentry/sentry/commit/ee44c6be35e5e464bc40637580f39867898acd8b
  - url: 'https://github.com/getsentry/self-hosted/releases/tag/23.6.2'
  - url: 'https://github.com/getsentry/sentry'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/sentry/PYSEC-2023-115.yaml
tags:
  - osv
  - pip
epss: 0.00666
epssPercentile: 0.49704
ingestedAt: '2026-09-12T03:13:01.656Z'
---

## Overview

### 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)

## Affected packages

- `sentry >= 23.6.0, < 23.6.2`

## Remediation

Upgrade to a patched release:

- `sentry 23.6.2`