CVE-2018-14774

mediumpriority · track · 29EPSS 0.011 · 66 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.11% (66th) EPSS

CVSS 5 · medium

Is it mine?

20 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

An issue was discovered in HttpKernel in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. When using HttpCache, the values of the X-Forwarded-Host headers are implicitly set as trusted while this should be forbidden, leading to potential host header injection.

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.2

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.07.2highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.7

v3.07.2highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · OSV

v3.06.6mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.2highAV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20USCWE-20US

affected products (20)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
SensioLabs, symfony community Symfony2.7.0 → 2.7.49fstec_bduRU
SensioLabs, symfony community Symfony2.8.0 → 2.8.44fstec_bduRU
SensioLabs, symfony community Symfony3.3.0 → 3.3.18fstec_bduRU
SensioLabs, symfony community Symfony3.4.0 → 3.4.14fstec_bduRU
SensioLabs, symfony community Symfony4.0.0 → 4.0.14fstec_bduRU
SensioLabs, symfony community Symfony4.1.0 → 4.1.3fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Common Edition≤ 1.6 «Смоленск»fstec_bduRU
sensiolabs symfony2.7.0 → 2.7.48nvdUScpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
sensiolabs symfony2.8.0 → 2.8.43nvdUScpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
sensiolabs symfony3.3.0 → 3.3.17nvdUScpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
sensiolabs symfony3.4.0 → 3.4.13nvdUScpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
sensiolabs symfony4.0.0 → 4.0.13nvdUScpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
sensiolabs symfony4.1.0 → 4.1.2nvdUScpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
Packagist symfony/symfony2.7.0 → 2.7.49osvUSpkg:composer/symfony/symfony
Packagist symfony/symfony2.8.0 → 2.8.44osvUSpkg:composer/symfony/symfony
Packagist symfony/symfony3.3.0 → 3.3.18osvUSpkg:composer/symfony/symfony
Packagist symfony/symfony3.4.0 → 3.4.14osvUSpkg:composer/symfony/symfony
Packagist symfony/symfony4.0.0 → 4.0.14osvUSpkg:composer/symfony/symfony
Packagist symfony/symfony4.1.0 → 4.1.3osvUSpkg:composer/symfony/symfony

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-66p6-7p29-55p9Symfony Host Header Injection2022-05-14ghsa · osvUS
An issue was discovered in HttpKernel in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. When using HttpCache, the values of the X-Forwarded-Host headers are implicitly set as trusted while this should be forbidden, leading to potential host header injection.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2018-08-03modified 2026-06-17

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references (6)

External citations — patches, advisories, analysis.

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