CVE-2019-18888
Argument injection in a MimeTypeGuesser in Symfony
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
CVE-2019-18888- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-88
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
CVE-2019-18888- Updated
- 2026-11-02
EUVDEUVD-2019-0807 No score
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
EUVD-2019-0807- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xhh6-956q-4q69
Argument injection in a MimeTypeGuesser in Symfony
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
GHSA-xhh6-956q-4q69- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-20, CWE-88
- Updated
- 2026-11-02
OSV
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
CVE-2019-18888- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2019-18888
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
DEBIAN-CVE-2019-18888- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-xhh6-956q-4q69
Argument injection in a MimeTypeGuesser in Symfony
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
GHSA-xhh6-956q-4q69- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-20, CWE-88
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-18888
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).
- Record
UBUNTU-CVE-2019-18888- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
symfony/http-foundationPackagist |
2.0.0 up to 2.8.52 | 2.8.52 |
symfony/http-foundationPackagist |
3.0.0 up to 3.4.35 | 3.4.35 |
symfony/http-foundationPackagist |
4.0.0 up to 4.2.12 | 4.2.12 |
symfony/http-foundationPackagist |
4.3.0 up to 4.3.8 | 4.3.8 |
symfony/mimePackagist |
4.3.0 up to 4.3.8 | 4.3.8 |
symfony/symfonyPackagist |
2.0.0 up to 2.8.52 | 2.8.52 |
symfony/symfonyPackagist |
3.0.0 up to 3.4.35 | 3.4.35 |
symfony/symfonyPackagist |
4.0.0 up to 4.2.12 | 4.2.12 |
symfony/symfonyPackagist |
4.3.0 up to 4.3.8 | 4.3.8 |
symfonyDebian:12 |
before 4.3.8+dfsg-1 | 4.3.8+dfsg-1 |
Show 16 moreShow less
| Package | Affected | Fixed |
|---|---|---|
symfonyDebian:13 |
before 4.3.8+dfsg-1 | 4.3.8+dfsg-1 |
symfonyDebian:14 |
before 4.3.8+dfsg-1 | 4.3.8+dfsg-1 |
symfonyDebian:8 From an advisory covering 3 CVEs |
before 2.3.21+dfsg-4+deb8u6, plus listed versions 2.3.21+dfsg-42.3.21+dfsg-4+deb8u12.3.21+dfsg-4+deb8u22.3.21+dfsg-4+deb8u32.3.21+dfsg-4+deb8u42.3.21+dfsg-4+deb8u5 |
2.3.21+dfsg-4+deb8u6 |
symfonyDebian:9 From an advisory covering 2 CVEs |
before 2.8.7+dfsg-1.3+deb9u3, plus listed versions 2.8.7+dfsg-1.32.8.7+dfsg-1.3+deb9u12.8.7+dfsg-1.3+deb9u2 |
2.8.7+dfsg-1.3+deb9u3 |
symfonyDebian:10 From an advisory covering 2 CVEs |
before 3.4.22+dfsg-2+deb10u1, plus listed versions 3.4.22+dfsg-2 |
3.4.22+dfsg-2+deb10u1 |
symfony/http-foundationPackagist |
2.0.0 up to 2.8.52, plus listed versions 2.0.42.0.52.0.62.0.7v2.0.10 Show 45 moreShow lessv2.0.12v2.0.13v2.0.14v2.0.15v2.0.16v2.0.17v2.0.18v2.0.19v2.0.20v2.0.21v2.0.22v2.0.23v2.0.24v2.0.25v2.0.9v2.1.0v2.1.1v2.1.10v2.1.11v2.1.12v2.1.13v2.1.2v2.1.3v2.1.4v2.1.5v2.1.6v2.1.7v2.1.8v2.1.9v2.2.0v2.2.1v2.2.10v2.2.11v2.2.2v2.2.3v2.2.4v2.2.5v2.2.6v2.2.7v2.2.8v2.2.9v2.3.0v2.3.1v2.3.10v2.3.11 |
2.8.52 |
symfony/http-foundationPackagist |
3.0.0 up to 3.4.35, plus listed versions v3.0.0v3.0.1v3.0.2v3.0.3v3.0.4 Show 45 moreShow lessv3.0.5v3.0.6v3.0.7v3.0.8v3.0.9v3.1.0v3.1.0-BETA1v3.1.0-RC1v3.1.1v3.1.10v3.1.2v3.1.3v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9v3.2.0v3.2.0-BETA1v3.2.0-RC1v3.2.0-RC2v3.2.1v3.2.10v3.2.11v3.2.12v3.2.13v3.2.14v3.2.2v3.2.3v3.2.4v3.2.5v3.2.6v3.2.7v3.2.8v3.2.9v3.3.0v3.3.0-BETA1v3.3.0-RC1v3.3.1v3.3.10v3.3.11v3.3.12v3.3.13v3.3.14 |
3.4.35 |
symfony/http-foundationPackagist |
4.0.0 up to 4.2.12, plus listed versions v4.0.0v4.0.1v4.0.10v4.0.11v4.0.12 Show 42 moreShow lessv4.0.13v4.0.14v4.0.15v4.0.2v4.0.3v4.0.4v4.0.5v4.0.6v4.0.7v4.0.8v4.0.9v4.1.0v4.1.0-BETA1v4.1.0-BETA2v4.1.0-BETA3v4.1.1v4.1.10v4.1.11v4.1.12v4.1.2v4.1.3v4.1.4v4.1.5v4.1.6v4.1.7v4.1.8v4.1.9v4.2.0v4.2.0-BETA1v4.2.0-BETA2v4.2.0-RC1v4.2.1v4.2.10v4.2.11v4.2.2v4.2.3v4.2.4v4.2.5v4.2.6v4.2.7v4.2.8v4.2.9 |
4.2.12 |
symfony/http-foundationPackagist |
4.3.0 up to 4.3.8, plus listed versions v4.3.0v4.3.1v4.3.2v4.3.3v4.3.4v4.3.5v4.3.6v4.3.7 |
4.3.8 |
symfony/mimePackagist |
4.3.0 up to 4.3.8, plus listed versions v4.3.0v4.3.1v4.3.2v4.3.3v4.3.4v4.3.5v4.3.6v4.3.7 |
4.3.8 |
symfony/symfonyPackagist |
2.0.0 up to 2.8.52, plus listed versions 2.0.42.0.52.0.62.0.7v2.0.10 Show 45 moreShow lessv2.0.11v2.0.12v2.0.13v2.0.14v2.0.15v2.0.16v2.0.17v2.0.18v2.0.19v2.0.20v2.0.21v2.0.22v2.0.23v2.0.24v2.0.25v2.0.9v2.1.0v2.1.0-BETA1v2.1.0-BETA2v2.1.0-BETA3v2.1.0-BETA4v2.1.0-RC1v2.1.0-RC2v2.1.1v2.1.10v2.1.11v2.1.12v2.1.13v2.1.2v2.1.3v2.1.4v2.1.5v2.1.6v2.1.7v2.1.8v2.1.9v2.2.0v2.2.0-BETA1v2.2.0-BETA2v2.2.0-RC1v2.2.0-RC2v2.2.0-RC3v2.2.1v2.2.10v2.2.11 |
2.8.52 |
symfony/symfonyPackagist |
3.0.0 up to 3.4.35, plus listed versions v3.0.0v3.0.1v3.0.2v3.0.3v3.0.4 Show 45 moreShow lessv3.0.5v3.0.6v3.0.7v3.0.8v3.0.9v3.1.0v3.1.0-BETA1v3.1.0-RC1v3.1.1v3.1.10v3.1.2v3.1.3v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9v3.2.0v3.2.0-BETA1v3.2.0-RC1v3.2.0-RC2v3.2.1v3.2.10v3.2.11v3.2.12v3.2.13v3.2.14v3.2.2v3.2.3v3.2.4v3.2.5v3.2.6v3.2.7v3.2.8v3.2.9v3.3.0v3.3.0-BETA1v3.3.0-RC1v3.3.1v3.3.10v3.3.11v3.3.12v3.3.13v3.3.14 |
3.4.35 |
symfony/symfonyPackagist |
4.0.0 up to 4.2.12, plus listed versions v4.0.0v4.0.1v4.0.10v4.0.11v4.0.12 Show 43 moreShow lessv4.0.13v4.0.14v4.0.15v4.0.2v4.0.3v4.0.4v4.0.5v4.0.6v4.0.7v4.0.8v4.0.9v4.1.0v4.1.0-BETA1v4.1.0-BETA2v4.1.0-BETA3v4.1.1v4.1.10v4.1.11v4.1.12v4.1.13v4.1.2v4.1.3v4.1.4v4.1.5v4.1.6v4.1.7v4.1.8v4.1.9v4.2.0v4.2.0-BETA1v4.2.0-BETA2v4.2.0-RC1v4.2.1v4.2.10v4.2.11v4.2.2v4.2.3v4.2.4v4.2.5v4.2.6v4.2.7v4.2.8v4.2.9 |
4.2.12 |
symfony/symfonyPackagist |
4.3.0 up to 4.3.8, plus listed versions v4.3.0v4.3.1v4.3.2v4.3.3v4.3.4v4.3.5v4.3.6v4.3.7 |
4.3.8 |
symfonyUbuntu:16.04:LTS |
All versions, plus listed versions 2.7.1+dfsg-12.7.5+dfsg-12.7.9+dfsg-12.7.9+dfsg-1ubuntu22.7.10-0ubuntu2 |
None known |
symfonyUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.8.7+dfsg-1.3ubuntu13.4.3+dfsg-1ubuntu43.4.6+dfsg-13.4.6+dfsg-1ubuntu0.13.4.6+dfsg-1ubuntu0.1+esm13.4.6+dfsg-1ubuntu0.1+esm2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-18888 is a high vulnerability (CVSS 7.5) in Sensiolabs Symfony, published November 18, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.25%, the 83rd percentile. Fixed in symfony/http-foundation 2.8.52.
References
symfony.com/blog/symfony-4-3-8-released
github.com/symfony/symfony/releases/tag/v4.3.8
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX
Show 14 moreShow less
nvd.nist.gov/vuln/detail/CVE-2019-18888
security-tracker.debian.org/tracker/CVE-2019-18888
ubuntu.com/security/CVE-2019-18888
cve.org/CVERecord?id=CVE-2019-18888
Left out here: 505 versions. The JSON record has them.