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CVE-2019-18887: Symfony Http-Kernel has non-constant time comparison in UriSigner

high Affects symfony/http-kernel, symfony/symfony. Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

Symfony Http-Kernel has non-constant time comparison in UriSigner

Package
symfony/http-kernel Composer
Affected versions
>=2.2.0 and <2.8.52 or >=3.0.0 and <3.4.35 or >=4.0.0 and <4.2.12 or >=4.3.0 and <4.3.8 or >=2.2.0 and <2.3.0 or >=2.3.0 and <2.4.0 or >=2.4.0 and <2.5.0 or >=2.5.0 and <2.6.0 or >=2.6.0 and <2.7.0 or >=2.7.0 and <2.8.0 or >=2.8.0 and <2.8.52 or >=3.0.0 and <3.1.0 or >=3.1.0 and <3.2.0 or >=3.2.0 and <3.3.0 or >=3.3.0 and <3.4.0 or >=3.4.0 and <3.4.35 or >=4.0.0 and <4.1.0 or >=4.1.0 and <4.2.0 or >=4.2.0 and <4.2.12
Fixed in
2.8.52, 3.4.35, 4.2.12, 4.3.8
Severity
high  CVSS 8.1
Exploitation
not on CISA KEV · EPSS 1% (71.2th percentile)
Published
2022-03-26
Source
osv.dev

References

Symfony Http-Kernel has non-constant time comparison in UriSigner

Package
symfony/symfony Composer
Affected versions
>=2.2.0 and <2.8.52 or >=3.0.0 and <3.4.35 or >=4.0.0 and <4.2.12 or >=4.3.0 and <4.3.8 or >=2.2.0 and <2.3.0 or >=2.3.0 and <2.4.0 or >=2.4.0 and <2.5.0 or >=2.5.0 and <2.6.0 or >=2.6.0 and <2.7.0 or >=2.7.0 and <2.8.0 or >=2.8.0 and <2.8.52 or >=3.0.0 and <3.1.0 or >=3.1.0 and <3.2.0 or >=3.2.0 and <3.3.0 or >=3.3.0 and <3.4.0 or >=3.4.0 and <3.4.35 or >=4.0.0 and <4.1.0 or >=4.1.0 and <4.2.0 or >=4.2.0 and <4.2.12
Fixed in
2.8.52, 3.4.35, 4.2.12, 4.3.8
Severity
high  CVSS 8.1
Exploitation
not on CISA KEV · EPSS 1% (71.2th percentile)
Published
2022-03-26
Source
osv.dev

References

CWE-203
NVD recordsymfony/http-kernel advisoriessymfony/symfony advisories

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