CVE-2019-18889 in the critical feed json
Symfony Unsafe Cache Serialization Could Enable RCE
published 2019-11-21 6 y ago modified 2026-06-17 4 mo ago also GHSA-79gr-58r3-pwm3 , EUVD-2019-0785
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 33.2%
- EPSS 33.2% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist symfony/cache 3.4.35, 4.2.12, 4.3.8
- packagist symfony/symfony 3.4.35, 4.2.12, 4.3.8
- symfony Debian 14, Debian 13, Debian 12 4.3.8+dfsg-1
debian advisories DEBIAN-CVE-2019-18889
Exploit prediction
33.25% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | symfony/cache | >=3.1.0, <3.4.35 >=4.0.0, <4.2.12 >=4.3.0, <4.3.8 |
3.4.35 4.2.12 4.3.8 |
| packagist | symfony/symfony | >=3.1.0, <3.4.35 >=4.0.0, <4.2.12 >=4.3.0, <4.3.8 |
3.4.35 4.2.12 4.3.8 |
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA/
vendor-advisory
-
symfony.com
/blog/cve-2019-18889-forbid-serializing-abstractadapter-and-tagawareadapter-instances
web, vendor-advisory
-
symfony.com
/blog/symfony-4-3-8-released
web, release-notes
-
github.com
/symfony/symfony/releases/tag/v4.3.8
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2019-18889
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/cache/CVE-2019-18889.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18889.yaml
web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA
web
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA
web
-
symfony.com
/cve-2019-18889
web
Sources
- CVE List CVE-2019-18889
- GitHub Advisory GHSA-79gr-58r3-pwm3
- NVD CVE-2019-18889
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