How severe is CVE-2019-3565?

CVE-2019-3565 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-2019-3565 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3565?

CVE-2019-3565 affects Facebook Thrift. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3565?

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-2019-3565 published?

CVE-2019-3565 was published on 2019-05-06 and last updated on 2026-06-17.

CVE-2019-3565

CVE-2019-3565 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: 3% (85th 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

Legacy C++ Facebook Thrift servers (using cpp instead of cpp2) 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 v2019.05.06.00.

Frequently asked questions

What is CVE-2019-3565?: Legacy C++ Facebook Thrift servers (using cpp instead of cpp2) 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 v2019.05.06.00.
How severe is CVE-2019-3565?: CVE-2019-3565 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-2019-3565 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3565?: CVE-2019-3565 affects Facebook Thrift. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3565?: 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-2019-3565 published?: CVE-2019-3565 was published on 2019-05-06 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Facebook Thrift

CVE-2021-24028 — Critical (CVSS 9.8): An invalid free in Thrift's table-based serialization can cause the application to crash or potentially result in code…
CVE-2019-11939 — High (CVSS 7.5): Golang Facebook Thrift servers would not error upon receiving messages declaring containers of sizes larger than the…
CVE-2019-3553 — High (CVSS 7.5): C++ Facebook Thrift servers would not error upon receiving messages declaring containers of sizes larger than the…
CVE-2019-11938 — High (CVSS 7.5): Java Facebook Thrift servers would not error upon receiving messages declaring containers of sizes larger than the…
CVE-2019-3564 — High (CVSS 7.5): Go Facebook Thrift servers would not error upon receiving messages with containers of fields of unknown type. As a…
CVE-2019-3559 — High (CVSS 7.5): Java Facebook Thrift servers would not error upon receiving messages with containers of fields of unknown type. As a…

All CVEs affecting Facebook Thrift →

Other CWE-755 (Improper Handling of Exceptional Conditions) vulnerabilities

CVE-2025-34193 — Critical (CVSS 9.8): Vasion Print (formerly PrinterLogic) Virtual Appliance Host versions prior to 25.1.102 and Application versions prior…
CVE-2025-10156 — Critical (CVSS 9.8): An Improper Handling of Exceptional Conditions vulnerability in the ZIP archive scanning component of mmaitre314…
CVE-2021-42142 — Critical (CVSS 9.8): An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers mishandle the early use of a…
CVE-2021-42141 — Critical (CVSS 9.8): An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. One incorrect handshake could complete with…
CVE-2023-38406 — Critical (CVSS 9.8): bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
CVE-2022-23121 — Critical (CVSS 9.8): This vulnerability allows remote attackers to execute arbitrary code on affected installations of Netatalk.…

Browse all CWE-755 (Improper Handling of Exceptional Conditions) vulnerabilities →