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HIGH severity

CVE-2019-3564 — fbthrift

HIGHFix: facebook/fbthrift@c461c1b

CVE-2019-3564 is a high-severity (CVSS 7.5) CWE-834 vulnerability in github.com/facebook/fbthrift. A fix is available for github.com/facebook/fbthrift — see the affected versions and patch details below.

Improper Input Validation and Excessive Iteration in Go Facebook Thrift

Also known asGHSA-x4rg-4545-4w7wGO-2021-0088
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs81th percentile — riskier than 81% of all scored CVEsHighest risk
0.03%0.85%1.67%2.49%0.5%2.0%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹github.com/facebook/fbthrift

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/facebook/fbthriftall versions0.31.1-0.20190225164308-c461c1bd1a3ego get github.com/facebook/fbthrift@v0.31.1-0.20190225164308-c461c1bd1a3e

Affected Products

1 product · 1 configurations
Application
thriftfacebook
< 2019.03.04.00
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/facebook/fbthrift, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/facebook/fbthrift to 0.31.1-0.20190225164308-c461c1bd1a3e or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-3564 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2019-3564: fbthrift DoS — Fix Available