How severe is CVE-2019-10758?

CVE-2019-10758 has a CVSS score of 9.9/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2019-10758?

CVE-2019-10758 affects the following packages: mongo-express (npm). Ecosystems affected: npm.

How do I fix CVE-2019-10758?

Update mongo-express to 0.54.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-10758 is resolved across your whole dependency graph.

How do I detect CVE-2019-10758 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mongo-express. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate CVE-2019-10758 if there is no patch (or I can't update yet)?

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.

How does O3 Security protect against CVE-2019-10758?

O3 pinpoints whether CVE-2019-10758 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is CVE-2019-10758 actively exploited in the wild?

Yes. There are 7 known exploit references for CVE-2019-10758, including 5 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2019-10758?

CVE-2019-10758 has an EPSS (Exploit Prediction Scoring System) score of 84.8%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2019-10758 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2019-10758 (MongoDB mongo-express Remote Code Execution Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2021-12-10. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-06-10. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2019-10758?

CVE-2019-10758 is classified as Code Injection (CWE-94). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Is there exploit tooling available for CVE-2019-10758?

A Nuclei detection template exists for CVE-2019-10758, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2019-10758 published, and has it been updated?

CVE-2019-10758 was published on December 24, 2019 and was last updated on July 9, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2021-12-10 — agencies required to remediate by 2022-06-10

📦 npm

CVE-2019-10758

CRITICAL

Remote Code Execution Vulnerability in NPM mongo-express

Also known asGHSA-h47j-hc6x-h3qqSNYK-JS-MONGOEXPRESS-473215

Published

Dec 24, 2019

Updated

Jul 9, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

7 known

EPSS Exploitation Probability

via FIRST.org ↗

84.8%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected

Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.

mongo-expressnpm

950downloads / week

Description

mongo-express before 0.54.0 is vulnerable to Remote Code Execution via endpoints that uses the toBSON method. A misuse of the vm dependency to perform exec commands in a non-safe environment.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`mongo-express`	all versions	0.54.0

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.