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HIGH severity

CVE-2019-11289 — gorouter

HIGHFix: cloudfoundry/gorouter@b1b5c44

CVE-2019-11289 is a high-severity (CVSS 8.6) Improper Input Validation vulnerability in code.cloudfoundry.org/gorouter. A fix is available for code.cloudfoundry.org/gorouter — see the affected versions and patch details below.

Cloud Foundry Routing Improper Input Validation vulnerability

Also known asGHSA-5796-p3m6-9qj4GO-2021-0102
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs74th percentile — riskier than 74% of all scored CVEsHighest risk
0.13%0.76%1.38%2.01%0.6%1.5%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2019-11289 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐹code.cloudfoundry.org/gorouter

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

Cloud Foundry Routing, all versions before 0.193.0, does not properly validate nonce input. A remote unauthenticated malicious user could forge an HTTP route service request using an invalid nonce that will cause the Gorouter to crash.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gocode.cloudfoundry.org/gorouterall versions0.0.0-20191101214924-b1b5c44e050fgo get code.cloudfoundry.org/gorouter@v0.0.0-20191101214924-b1b5c44e050f

Affected Products

2 products · 2 configurations
Application
cf-deploymentcloudfoundry
< 12.8.0
range
Application
routing-releasecloudfoundry
< 0.193.0
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 code.cloudfoundry.org/gorouter, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update code.cloudfoundry.org/gorouter to 0.0.0-20191101214924-b1b5c44e050f or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-11289 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Cloud Foundry Routing, all versions before 0.193.0, does not properly validate nonce input. A remote unauthenticated malicious user could forge an HTTP route service request using an invalid nonce that will cause the Gorouter to crash.
O3 Security · Impact-Aware SCA

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CVE-2019-11289: gorouter — Fix Available