CVE catalog

CVE-2026-106438

Severity: Medium · CVSS 5.1CVSS:4.0/AV:L/AC:L/AT:N/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: Oct 8, 2026, 7:16:59 PM UTC
Updated: Oct 8, 2026, 7:16:59 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.11% · Oct 22, 2026

An incorrect calculation in Decimal128 string parsing in the MongoDB C Driver can accept certain over-precision inputs containing leading zeros instead of rejecting them. This produces a value different from the supplied text. An actor who can provide a decimal string to an embedding application, including through Extended JSON parsing, can cause the application to store or use an incorrect numeric value.

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

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	mongo-c-driver	source	sid	`2.5.6-1`	not yet assigned	Not reported	Not reported
Debian	mongo-c-driver	source	forky	`2.5.6-1`	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

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

Observed: Oct 23, 2026, 7:39:53 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)]