Deserialization of Untrusted Data in bson

published 2020-03-30 6 y ago modified 2026-07-08 4 mo ago also GHSA-v8w9-2789-6hhr , EUVD-2021-1199

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.3%; EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

All versions of bson before 1.1.4 are vulnerable to Deserialization of Untrusted Data. The package will ignore an unknown value for an object's _bsotype, leading to cases where an object is serialized as a document rather than the intended BSON type.

Patch / fix

fixed in 2 distros 1 links 2

npm bson 1.1.4
mongodb bson 1.1.4

node-mongodb Debian 12 3.5.6+~cs11.12.19-1

debian advisories DEBIAN-CVE-2020-7610

github.com/mongodb/js-bson@3809c13 commit
snyk.io/vuln/SNYK-JS-BSON-561052 advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-7610 updated 2026-08-05 cvss 9.8

bson: Deserialization of Untrusted Data could result in Code injection or Excessive CPU load

Red Hat OpenShift Application Runtimes bson
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.27% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	bson	<1.1.4	1.1.4

Affected products

n/a bson

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

snyk.io /vuln/SNYK-JS-BSON-561052
web, patch, third-party-advisory
github.com /mongodb/js-bson/commit/3809c1313a7b2a8001065f0271199df9fa3d16a8
web
nvd.nist.gov /vuln/detail/CVE-2020-7610
advisory

Sources

CVE List CVE-2020-7610
GitHub Advisory GHSA-v8w9-2789-6hhr
NVD CVE-2020-7610

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary