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CVE-2019-2391

20
FAUCET Score

CVE-2019-2391 describes an incorrect parsing vulnerability in MongoDB Inc.'s js-bson library, versions 1.1.3 and prior. This flaw can lead to improper BSON serialization when processing specific JSON input, potentially causing unexpected application behavior and data disclosure. The vulnerability has a CVSS v3.1 score of 5.4 (Medium), indicating it can be exploited remotely with low attack complexity and requires low privileges. Successful exploitation could result in limited confidentiality and integrity impacts. Currently, there is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, aligning with the typical low attention for most vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.4CPE matchmatch criteria
cpe:2.3:a:mongodb:js-bson:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.2MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.91%
Probability of exploitation in next 30 days
EPSS Percentile
56.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0091 is in the 68th percentile among its peer group of 21,951 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: bsonFixed in: 1.1.4

Vendor Advisories (1)

npmGHSA-4jwp-vfvf-657pmedium

Deserialization of Untrusted Data in bson

Feb 10, 2022

References

github.com / mongodb/js-bson/releases/tag/v1.1.4
PatchRelease NotesThird Party Advisory