# CVE-2020-15094

## Summary

- **CVE ID:** CVE-2020-15094
- **Severity:** HIGH
- **CVSS Score:** 8 (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H)
- **CWE:** CWE-212
- **Published:** Sep 2, 2020
- **Last Modified:** Mar 14, 2026

## Description

In Symfony before versions 4.4.13 and 5.1.5, the CachingHttpClient class from the HttpClient Symfony component relies on the HttpCache class to handle requests. HttpCache uses internal headers like X-Body-Eval and X-Body-File to control the restoration of cached responses. The class was initially written with surrogate caching and ESI support in mind (all HTTP calls come from a trusted backend in that scenario). But when used by CachingHttpClient and if an attacker can control the response for a request being made by the CachingHttpClient, remote code execution is possible. This has been fixed in versions 4.4.13 and 5.1.5.

## Affected Products

- symfony — symfony (>= 4.4.0, < 4.4.13)
- symfony — symfony (>= 5.0.0, < 5.1.5)

## References

- [CNA](https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r)
- [CNA](https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78)
- [CNA](https://packagist.org/packages/symfony/symfony)
- [CNA](https://packagist.org/packages/symfony/http-kernel)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 2.25%
- **EPSS Percentile:** 84.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._