Vulnerability Database · Packagist · Package report
symfony/http-kernel: vulnerability history, versions and safety
symfony/http-kernel is a package in the Packagist ecosystem. Vulert records 7 vulnerabilities for it across 120 releases, from Sep 2020 to May 2026. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.
Every vulnerability has a patched version to move to.
No published version shipped hostile code.
Vulert verdict on symfony/http-kernel i
Updated on 22 Oct 2026
Every vulnerability Vulert records for this package has a fix, and the newest was recorded 27 May 2026. Apply the fixes listed below and you are clear.
What to do: Move the affected dependencies to the fixed versions listed below, then keep the package monitored so the next vulnerability reaches you. Fix it, then keep watch: Vulert alerts you when a new vulnerability affects the version you run. Monitor it with Vulert →
- Vulnerabilities on record 7 over 5 years · 1 in the last year i
- Latest disclosure 27 May 2026 i
- Highest CVSS 8.1 i
- With no published fix 0 i
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01 Versions
Which versions are affected
Every version Vulert holds for symfony/http-kernel, newest first, with the vulnerabilities that name it. A version with a count of zero has no recorded vulnerabilities; open a version to see the vulnerabilities it is exposed to.
Newest 120 of 529 versions on record. Severity counts are the vulnerabilities recorded against that exact release.
02 Disclosure history
How often vulnerabilities are recorded
Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 1 of the 7 were recorded in the last 12 months.
03 Vulnerabilities
Recorded vulnerabilities for symfony/http-kernel
| Vulnerability | Severity | Fixed version ↓ | Disclosed ↓ |
|---|---|---|---|
| CVE-2019-18887: Non-constant time comparison in UriSigner | 8.1 high | 2.8.52 | 26 Mar 2022 |
| CVE-2020-15094: RCE in Symfony | 8.0 high | 4.4.13 | 02 Sep 2020 |
| CVE-2014-5245: Symfony HttpKernel Component ESI URLs Direct Access Vulnerability | 7.5 high | 2.3.19 | 30 May 2024 |
| CVE-2021-41267: Webcache Poisoning in symfony/http-kernel | 6.5 medium | 5.3.12 | 24 Nov 2021 |
| CVE-2026-45075: Symfony HTTP Kernel Bypass of Authorization Checks via HEAD Requests | 6.2 medium | 7.4.12 | 27 May 2026 |
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Updated: 22/Oct/2026 · Vulnerabilities in our DB: 524173
