# CVE-2026-33942: Saloon has insecure deserialization in AccessTokenAuthenticator

Source: https://junglewise.ai/threats/cve-2026-33942-saloon-has-insecure-deserialization-in-accesstokenauthenticator  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-27  
License: CC BY 4.0 with a link back

CVE-2026-33942 · Severity: medium · CVSS 4 · Published 2026-03-27

Saloon has insecure deserialization in AccessTokenAuthenticator

Technologies: [saloonphp/saloon (Packagist)](https://junglewise.ai/threats/technologies/saloonphp-saloon). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2026-33942 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33942 being exploited in the wild.

**How severe is CVE-2026-33942?** Medium severity, with a CVSS score of 4, published 27 March 2026.

**Which products and versions are affected?** saloonphp/saloon (Packagist) ECOSYSTEM:introduced=0,fixed=4.0.0.

**Is there a fix for CVE-2026-33942?** Yes. saloonphp/saloon (Packagist): upgrade to 4.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-33942?** Check whether you run saloonphp/saloon (Packagist) 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

- saloonphp/saloon (Packagist): upgrade to 4.0.0 or later

  ```sh
  composer require saloonphp/saloon:^4.0.0
  ```


## Affected products

- saloonphp/saloon (Packagist) ECOSYSTEM:introduced=0,fixed=4.0.0

## Identifiers

- CVE-2026-33942
- GHSA-rf88-776r-rcq9

## Related threats

- [Saloon has a Fixture Name Path Traversal Vulnerability](https://junglewise.ai/threats/cve-2026-33183-saloon-has-a-fixture-name-path-traversal-vulnerability)
- [Saloon is vulnerable to SSRF and credential leakage via absolute URL in endpoint overriding base URL](https://junglewise.ai/threats/cve-2026-33182-saloon-is-vulnerable-to-ssrf-and-credential-leakage-via-absolute)