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HIGH severity

CVE-2019-11939 — fbthrift

HIGHFix: facebook/fbthrift@483ed86

CVE-2019-11939 is a high-severity (CVSS 7.5) CWE-770 vulnerability in github.com/facebook/fbthrift. A fix is available for github.com/facebook/fbthrift — see the affected versions and patch details below.

Golang Facebook Thrift servers vulnerable to denial of service

Also known asGHSA-w3r9-r9w7-8h48GO-2021-0082
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 31, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs75th percentile — riskier than 75% of all scored CVEsHighest risk
0.04%0.71%1.38%2.06%0.5%1.6%May 26Sep 26Oct 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

Golang Facebook Thrift servers would not error upon receiving messages declaring containers of sizes larger than the payload. As a result, malicious clients could send short messages which would result in a large memory allocation, potentially leading to denial of service. This issue affects Facebook Thrift prior to v2020.03.16.00.

Specific Go Packages Affected

github.com/facebook/fbthrift/thrift/lib/go/thrift

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/facebook/fbthriftall versions0.31.1-0.20200311080807-483ed864d69fgo get github.com/facebook/fbthrift@v0.31.1-0.20200311080807-483ed864d69f

Affected Products

1 product · 1 configurations
Application
thriftfacebook
< 2020.03.16.00
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 0.31.1-0.20200311080807-483ed864d69f or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-11939 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

Golang Facebook Thrift servers would not error upon receiving messages declaring containers of sizes larger than the payload. As a result, malicious clients could send short messages which would result in a large memory allocation, potentially leading to denial of service. This issue affects Facebook Thrift prior to v2020.03.16.00. ### Specific Go Packages Affected github.com/facebook/fbthrift/thrift/lib/go/thrift
O3 Security · Impact-Aware SCA

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CVE-2019-11939: fbthrift DoS — Fix Available