How severe is CVE-2016-6639?

CVE-2016-6639 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-6639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6639?

CVE-2016-6639 primarily affects Cloudfoundry Php-buildpack. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-6639?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-6639 published?

CVE-2016-6639 was published on 2016-09-18 and last updated on 2026-06-17.

CVE-2016-6639

CVE-2016-6639 is a high-severity vulnerability in Cloudfoundry Php-buildpack with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-254.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-254
Affected product: Cloudfoundry Php-buildpack
Published: 2016-09-18
Last modified: 2026-06-17

Description

Cloud Foundry PHP Buildpack (aka php-buildpack) before 4.3.18 and PHP Buildpack Cf-release before 242, as used in Pivotal Cloud Foundry (PCF) Elastic Runtime before 1.6.38 and 1.7.x before 1.7.19 and other products, place the .profile file in the htdocs directory, which might allow remote attackers to obtain sensitive information via an HTTP GET request for this file.

Frequently asked questions

What is CVE-2016-6639?: Cloud Foundry PHP Buildpack (aka php-buildpack) before 4.3.18 and PHP Buildpack Cf-release before 242, as used in Pivotal Cloud Foundry (PCF) Elastic Runtime before 1.6.38 and 1.7.x before 1.7.19 and other products, place the .profile file in the htdocs directory, which might allow remote attackers to obtain sensitive information via an HTTP GET request for this file.
How severe is CVE-2016-6639?: CVE-2016-6639 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-6639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6639?: CVE-2016-6639 primarily affects Cloudfoundry Php-buildpack. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-6639?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-6639 published?: CVE-2016-6639 was published on 2016-09-18 and last updated on 2026-06-17.

References

Affected products (21)

cpe:2.3:a:cloudfoundry:php-buildpack:*:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:*:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.1:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.2:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.3:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.4:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.5:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.6:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.7:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.8:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.9:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.10:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.11:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.12:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.13:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.14:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.15:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.16:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.17:*:*:*:*:*:*:*
cpe:2.3:a:pivotal:cloud_foundry_elastic_runtime:1.7.18:*:*:*:*:*:*:*

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