# CVE-2024-23647: GO-2024-2479 - Authentik vulnerable to PKCE downgrade attack in goauthentik.io

Source: https://junglewise.ai/threats/cve-2024-23647-authentik-vulnerable-to-pkce-downgrade-attack  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-06-28  
License: CC BY 4.0 with a link back

CVE-2024-23647 · Severity: low · CVSS 3.1 · Published 2024-06-28

Authentik vulnerable to PKCE downgrade attack in goauthentik.io

Technologies: [goauthentik.io (Go)](https://junglewise.ai/threats/technologies/goauthentik-io). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2024-23647 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-23647 being exploited in the wild.

**How severe is CVE-2024-23647?** Low severity, with a CVSS score of 3.1, published 28 June 2024.

**Which products and versions are affected?** goauthentik.io (Go) SEMVER:introduced=0, SEMVER:introduced=2023.10.0,fixed=2023.10.7.

**Is there a fix for CVE-2024-23647?** Yes. goauthentik.io (Go): upgrade to 2023.10.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2024-23647?** Check whether you run goauthentik.io (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- goauthentik.io (Go): upgrade to 2023.10.7 or later

  ```sh
  go get goauthentik.io@v2023.10.7
  ```


## Affected products

- goauthentik.io (Go) SEMVER:introduced=0, SEMVER:introduced=2023.10.0,fixed=2023.10.7

## Identifiers

- CVE-2024-23647
- GHSA-mrx3-gxjx-hjqj
- GO-2024-2479

## Related threats

- [goauthentik authentik XML Signature Wrapping in SAML Source ACS](https://junglewise.ai/threats/cve-2026-47201-goauthentik-authentik-xml-signature-wrapping-in-saml-source-acs)
- [GO-2025-4136 - authentik's invitation expiry is delayed by at least 5 minutes in goauthentik.io](https://junglewise.ai/threats/cve-2025-64708-authentik-s-invitation-expiry-is-delayed-by-at-least-5-minutes)
- [GO-2025-4137 - authentik allows a deactivated Service account to authenticate to OAuth in goauthentik.io](https://junglewise.ai/threats/cve-2025-64521-pysec-2025-237-authentik-is-an-open-source-identity-provider)
- [Authentik has insufficient check for account active status when authenticating with OAuth/SAML Sources](https://junglewise.ai/threats/cve-2025-53942-authentik-has-insufficient-check-for-account-active-status-when)
- [GO-2024-3085 - GoAuthentik vulnerable to Insufficient Authorization for several API endpoints in goauthentik.io](https://junglewise.ai/threats/cve-2024-42490-goauthentik-vulnerable-to-insufficient-authorization-for-several)