How severe is CVE-2019-3564?

CVE-2019-3564 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 none, integrity none, and availability high.

Is CVE-2019-3564 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3564?

CVE-2019-3564 affects Facebook Thrift. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3564?

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-2019-3564 published?

CVE-2019-3564 was published on 2019-05-06 and last updated on 2026-06-17.

CVE-2019-3564

CVE-2019-3564 is a high-severity vulnerability in Facebook Thrift 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-755.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-755
Affected product: Facebook Thrift
Published: 2019-05-06
Last modified: 2026-06-17

Description

Go Facebook Thrift servers would not error upon receiving messages with containers of fields of unknown type. As a result, malicious clients could send short messages which would take a long time for the server to parse, potentially leading to denial of service. This issue affects Facebook Thrift prior to v2019.03.04.00.

Frequently asked questions

What is CVE-2019-3564?: Go Facebook Thrift servers would not error upon receiving messages with containers of fields of unknown type. As a result, malicious clients could send short messages which would take a long time for the server to parse, potentially leading to denial of service. This issue affects Facebook Thrift prior to v2019.03.04.00.
How severe is CVE-2019-3564?: CVE-2019-3564 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 none, integrity none, and availability high.
Is CVE-2019-3564 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3564?: CVE-2019-3564 affects Facebook Thrift. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3564?: 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-2019-3564 published?: CVE-2019-3564 was published on 2019-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:facebook:thrift:*:*:*:*:*:*:*:*

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