CVE catalog

CVE-2026-84963

An incorrect numeric conversion in the JSON parsing component of the MongoDB C Driver's BSON library may cause an unusually large text value to be silently shortened, or the corresponding field to be

[CVE catalog]

Severity: Medium · CVSS 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Sep 3, 2026, 4:18:25 PM UTC
Updated: Sep 3, 2026, 4:25:43 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.31% · Oct 23, 2026

An incorrect numeric conversion in the JSON parsing component of the MongoDB C Driver's BSON library may cause an unusually large text value to be silently shortened, or the corresponding field to be omitted, while the parsing operation still reports success and returns no error. An unauthenticated party who can supply the input processed by an application that uses this component may cause that application to hold data that does not match what was submitted, which may result in unintended alteration of data.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	mongo-c-driver	sid	`2.5.7-1`	fixed
Debian	mongo-c-driver	forky	`2.5.6-1`	fixed
Debian	mongo-c-driver	trixie	`1.30.4-1+deb13u3`	vulnerable
Debian	mongo-c-driver	bookworm	`1.23.1-1+deb12u3`	vulnerable
Cpe	c_driver	Not reported	`2.5.2`	fixed
Opensuse	mongo-c-driver	tumbleweed	`2.5.2-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	mongo-c-driver	source	sid	`2.5.2-1`	not yet assigned	Not reported	Not reported
Debian	mongo-c-driver	source	forky	`2.5.2-1`	not yet assigned	Not reported	Not reported
Debian	mongo-c-driver	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	mongo-c-driver	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	c_driver	cpe	Not reported	`2.5.2`	Not reported	NVD-CVE-2026-84963	Not reported
Opensuse	mongo-c-driver	rpm	tumbleweed	`2.5.2-1.1`	Not reported	OPENSUSE-SU-2026:11706-1	Not reported

Notes

[trixie] mongo-c-driver: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libbson-1.0-0]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libbson-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libbson-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libmongoc-1.0-0]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libmongoc-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · amd64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · arm64 · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[libmongoc-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- 1.23.1-1+deb12u3 · all · bookworm
  Affected
  nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12

[Debian 13 (Trixie)]

[libbson-1.0-0t64]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libbson-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libbson-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libmongoc-1.0-0t64]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libmongoc-dev]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · amd64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · arm64 · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
[libmongoc-doc]Affected
Source package: [mongo-c-driver]
Details (2)
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13
- 1.30.4-1+deb13u2 · all · trixie
  Affected
  nvd · mongo-c-driver · debian · 13

[openSUSE Tumbleweed]

[bson-devel]Unknown
Source package: [mongo-c-driver]
Details (1)
- 2.4.0-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.5.2-1.1
  Version impact unknown
  nvd · mongo-c-driver · opensuse · tumbleweed
[libbson2]Unknown
Source package: [mongo-c-driver]
Details (1)
- 2.4.0-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.5.2-1.1
  Version impact unknown
  nvd · mongo-c-driver · opensuse · tumbleweed
[libmongoc2]Unknown
Source package: [mongo-c-driver]
Details (1)
- 2.4.0-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.5.2-1.1
  Version impact unknown
  nvd · mongo-c-driver · opensuse · tumbleweed
[mongo-c-driver-devel]Unknown
Source package: [mongo-c-driver]
Details (1)
- 2.4.0-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.5.2-1.1
  Version impact unknown
  nvd · mongo-c-driver · opensuse · tumbleweed

Observed: Oct 23, 2026, 9:32:40 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]