How severe is CVE-2019-3569?

CVE-2019-3569 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-2019-3569 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3569?

CVE-2019-3569 primarily affects Facebook Hhvm. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-3569?

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-2019-3569 published?

CVE-2019-3569 was published on 2019-06-26 and last updated on 2026-06-17.

CVE-2019-3569

CVE-2019-3569 is a high-severity vulnerability in Facebook Hhvm 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-668.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Facebook Hhvm
Published: 2019-06-26
Last modified: 2026-06-17

Description

HHVM, when used with FastCGI, would bind by default to all available interfaces. This behavior could allow a malicious individual unintended direct access to the application, which could result in information disclosure. This issue affects versions 4.3.0, 4.4.0, 4.5.0, 4.6.0, 4.7.0, 4.8.0, versions 3.30.5 and below, and all versions in the 4.0, 4.1, and 4.2 series.

Frequently asked questions

What is CVE-2019-3569?: HHVM, when used with FastCGI, would bind by default to all available interfaces. This behavior could allow a malicious individual unintended direct access to the application, which could result in information disclosure. This issue affects versions 4.3.0, 4.4.0, 4.5.0, 4.6.0, 4.7.0, 4.8.0, versions 3.30.5 and below, and all versions in the 4.0, 4.1, and 4.2 series.
How severe is CVE-2019-3569?: CVE-2019-3569 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-2019-3569 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3569?: CVE-2019-3569 primarily affects Facebook Hhvm. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-3569?: 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-2019-3569 published?: CVE-2019-3569 was published on 2019-06-26 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.0.3:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.0.4:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.3.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.4.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.5.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.6.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.7.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:hhvm:4.8.0:*:*:*:*:*:*:*

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