# CVE-2019-10912: Deserialization of untrusted data in Symfony

Source: https://junglewise.ai/threats/cve-2019-10912-deserialization-of-untrusted-data-in-symfony  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-02-12  
License: CC BY 4.0 with a link back

CVE-2019-10912 · Severity: low · CVSS 3 · Published 2020-02-12

Deserialization of untrusted data in Symfony

Technologies: [symfony/cache (Packagist)](https://junglewise.ai/threats/technologies/symfony-cache), [symfony/symfony (Packagist)](https://junglewise.ai/threats/technologies/symfony-symfony), [typo3/cms (Packagist)](https://junglewise.ai/threats/technologies/packagist-typo3-cms), [typo3/cms-core (Packagist)](https://junglewise.ai/threats/technologies/typo3-cms-core). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2019-10912 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-10912 being exploited in the wild.

**How severe is CVE-2019-10912?** Low severity, with a CVSS score of 3, published 12 February 2020.

**Which products and versions are affected?** symfony/cache (Packagist) ECOSYSTEM:introduced=3.1.0,fixed=3.4.26; symfony/phpunit-bridge (Packagist) ECOSYSTEM:introduced=2.8.0,fixed=2.8.50; symfony/symfony (Packagist) ECOSYSTEM:introduced=2.8.0,fixed=2.8.50; typo3/cms (Packagist) ECOSYSTEM:introduced=9.0.0,fixed=9.5.8; and 1 more.

**Is there a fix for CVE-2019-10912?** Yes. symfony/cache (Packagist): upgrade to 3.4.26 or later; symfony/phpunit-bridge (Packagist): upgrade to 2.8.50 or later; symfony/symfony (Packagist): upgrade to 2.8.50 or later; typo3/cms (Packagist): upgrade to 9.5.8 or later; typo3/cms-core (Packagist): upgrade to 9.5.8 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-10912?** Check whether you run symfony/cache (Packagist), symfony/phpunit-bridge (Packagist), symfony/symfony (Packagist) or one of the others listed 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

- symfony/cache (Packagist): upgrade to 3.4.26 or later

  ```sh
  composer require symfony/cache:^3.4.26
  ```

- symfony/phpunit-bridge (Packagist): upgrade to 2.8.50 or later

  ```sh
  composer require symfony/phpunit-bridge:^2.8.50
  ```

- symfony/symfony (Packagist): upgrade to 2.8.50 or later

  ```sh
  composer require symfony/symfony:^2.8.50
  ```

- typo3/cms (Packagist): upgrade to 9.5.8 or later

  ```sh
  composer require typo3/cms:^9.5.8
  ```

- typo3/cms-core (Packagist): upgrade to 9.5.8 or later

  ```sh
  composer require typo3/cms-core:^9.5.8
  ```


## Affected products

- symfony/cache (Packagist) ECOSYSTEM:introduced=3.1.0,fixed=3.4.26
- symfony/phpunit-bridge (Packagist) ECOSYSTEM:introduced=2.8.0,fixed=2.8.50
- symfony/symfony (Packagist) ECOSYSTEM:introduced=2.8.0,fixed=2.8.50
- typo3/cms (Packagist) ECOSYSTEM:introduced=9.0.0,fixed=9.5.8
- typo3/cms-core (Packagist) ECOSYSTEM:introduced=9.0.0,fixed=9.5.8

## Identifiers

- CVE-2019-10912
- GHSA-w2fr-65vp-mxw3

## Related threats

- [Symfony YAML stack exhaustion in inline lexer](https://junglewise.ai/threats/cve-2026-109413-in-symfony-yaml-prior-to-versions-5-4-54-6-4-45-7-4-18-and-8-1-6)
- [Symfony HTTP Foundation ReDoS in HeaderUtils::split()](https://junglewise.ai/threats/cve-2026-108082-symfony-is-a-php-framework-for-web-and-console-applications-and)
- [The referrer enforcement introduced with TYPO3-CORE-SA-2020-006 became ineffective in TYPO3 v13.0, where TYPO3 CMS started](https://junglewise.ai/threats/cve-2026-19418-typo3-cms-broken-access-control-in-backend-and-install-tool)
- [Symfony Routing improper dot-segment encoding in UrlGenerator](https://junglewise.ai/threats/cve-2026-48784-symfony-routing-improper-dot-segment-encoding-in-urlgenerator)
- [Symfony HtmlSanitizer XSS via incomplete URL attribute sanitization](https://junglewise.ai/threats/cve-2026-48761-symfony-htmlsanitizer-xss-via-incomplete-url-attribute)