CVE-2020-15094RCE in Symfony
- 8.0HighCVSS base score
- 3.0%Exploitation in 30 daysEPSS · top 12% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
- 2 months later
· 2 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 3.0% · top 12% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.0.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistsymfony/http-kernelGHSA-754h-5r27-7x3r (opens in a new tab)
- Packagistsymfony/symfonyGHSA-754h-5r27-7x3r (opens in a new tab)
References
References6
- https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78 (opens in a new tab)x_refsource_MISCx_transferred
- https://packagist.org/packages/symfony/symfony (opens in a new tab)x_refsource_MISCx_transferred
- https://packagist.org/packages/symfony/http-kernel (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2020-16eb328853 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2020-1c549262f1 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-0840 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-754h-5r27-7x3r (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-15094)Record last updated .