High severity8.1NVD Advisory· Published Nov 21, 2019· Updated Jun 17, 2026
CVE-2019-18887
CVE-2019-18887
Description
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. The UriSigner was subject to timing attacks. This is related to symfony/http-kernel.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
symfony/http-kernelPackagist | >= 2.2.0, < 2.8.52 | 2.8.52 |
symfony/http-kernelPackagist | >= 3.0.0, < 3.4.35 | 3.4.35 |
symfony/http-kernelPackagist | >= 4.0.0, < 4.2.12 | 4.2.12 |
symfony/http-kernelPackagist | >= 4.3.0, < 4.3.8 | 4.3.8 |
symfony/symfonyPackagist | >= 2.2.0, < 2.8.52 | 2.8.52 |
symfony/symfonyPackagist | >= 3.0.0, < 3.4.35 | 3.4.35 |
symfony/symfonyPackagist | >= 4.0.0, < 4.2.12 | 4.2.12 |
symfony/symfonyPackagist | >= 4.3.0, < 4.3.8 | 4.3.8 |
Affected products
6cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- Symfony/Symfonydescription
- ghsa-coords2 versions
>= 2.2.0, < 2.8.52+ 1 more
- (no CPE)range: >= 2.2.0, < 2.8.52
- (no CPE)range: >= 2.2.0, < 2.8.52
Patches
Vulnerability mechanics
References
17- github.com/advisories/GHSA-q8hg-pf8v-cxrvghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2019-18887ghsaADVISORY
- symfony.com/blog/cve-2019-18887-use-constant-time-comparison-in-urisignernvdVendor AdvisoryWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2019-18887.yamlghsaWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18887.yamlghsaWEB
- github.com/symfony/symfony/releases/tag/v4.3.8nvdRelease NotesWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJXghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EAghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJXghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EAghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZghsaWEB
- symfony.com/blog/symfony-4-3-8-releasednvdRelease NotesWEB
- symfony.com/cve-2019-18887ghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ/nvd
News mentions
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