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CVE-2019-18889

Symfony Unsafe Cache Serialization Could Enable RCE

9.8 CriticalFix available

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

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
High
Integrity
High
Availability
High

Exploit likelihood

33.2%Up 31.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
CVE-2019-18889
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-94
Updated
2026-11-02
CVE List No score

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
CVE-2019-18889
Updated
2026-11-02
EUVDEUVD-2019-0785 No score

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
EUVD-2019-0785
Updated
2026-11-03
GitHub AdvisoriesGHSA-79gr-58r3-pwm3 9.8

Symfony Unsafe Cache Serialization Could Enable RCE

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
GHSA-79gr-58r3-pwm3
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-94
Updated
2026-11-02
OSV 9.8

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
CVE-2019-18889
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2019-18889 9.8

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
DEBIAN-CVE-2019-18889
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-79gr-58r3-pwm3 9.8

Symfony Unsafe Cache Serialization Could Enable RCE

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
GHSA-79gr-58r3-pwm3
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-94
Updated
2026-11-02
OSVUBUNTU-CVE-2019-18889 9.8

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

Record
UBUNTU-CVE-2019-18889
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
symfony/cache
Packagist
 3.1.0 up to 3.4.35
3.4.35
symfony/cache
Packagist
 4.0.0 up to 4.2.12
4.2.12
symfony/cache
Packagist
 4.3.0 up to 4.3.8
4.3.8
symfony/symfony
Packagist
 3.1.0 up to 3.4.35
3.4.35
symfony/symfony
Packagist
 4.0.0 up to 4.2.12
4.2.12
symfony/symfony
Packagist
 4.3.0 up to 4.3.8
4.3.8
symfony
Debian:12
 before 4.3.8+dfsg-1
4.3.8+dfsg-1
symfony
Debian:13
 before 4.3.8+dfsg-1
4.3.8+dfsg-1
symfony
Debian:14
 before 4.3.8+dfsg-1
4.3.8+dfsg-1
symfony/cache
Packagist
 3.1.0 up to 3.4.35, plus listed versions
v3.1.0v3.1.1v3.1.10v3.1.2v3.1.3
Show 45 moreShow less
v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9v3.2.0v3.2.0-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-RC1v3.3.1v3.3.10v3.3.11v3.3.12v3.3.13v3.3.14v3.3.15v3.3.16v3.3.17v3.3.18v3.3.2v3.3.3v3.3.4v3.3.5v3.3.6v3.3.7v3.3.8v3.3.9
3.4.35
Show 7 moreShow less
Affected packages
PackageAffectedFixed
symfony/cache
Packagist
 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 less
v4.0.13v4.0.14v4.0.15v4.0.2v4.0.3v4.0.4v4.0.5v4.0.6v4.0.7v4.0.8v4.0.9v4.1.0v4.1.0-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/cache
Packagist
 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/symfony
Packagist
 3.1.0 up to 3.4.35, plus listed versions
v3.1.0v3.1.1v3.1.10v3.1.2v3.1.3
Show 45 moreShow less
v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9v3.2.0v3.2.0-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-RC1v3.3.1v3.3.10v3.3.11v3.3.12v3.3.13v3.3.14v3.3.15v3.3.16v3.3.17v3.3.18v3.3.2v3.3.3v3.3.4v3.3.5v3.3.6v3.3.7v3.3.8v3.3.9
3.4.35
symfony/symfony
Packagist
 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 less
v4.0.13v4.0.14v4.0.15v4.0.2v4.0.3v4.0.4v4.0.5v4.0.6v4.0.7v4.0.8v4.0.9v4.1.0v4.1.0-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/symfony
Packagist
 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
Ubuntu: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
symfony
Ubuntu: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

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-18889 is a critical vulnerability (CVSS 9.8) in Sensiolabs Symfony, published November 21, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 33.2%, the 98th percentile. Fixed in symfony/cache 3.4.35.

References

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Left out here: 82 versions. The JSON record has them.

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