CVE catalog
CVE-2026-106429
An integer underflow in the KMS endpoint-parsing logic of MongoDB libmongocrypt can cause an allocation failure that terminates the application process. This can occur when an authenticated user modif
- Severity
- High · CVSS 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.29% · Oct 25, 2026
An integer underflow in the KMS endpoint-parsing logic of MongoDB libmongocrypt can cause an allocation failure that terminates the application process. This can occur when an authenticated user modifies a key document in the key vault collection, or when an application accepts a KMS endpoint containing a colon after its path or query during key creation. The issue does not access memory outside its allocated bounds.
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 | libmongocrypt | sid | 1.21.1-1 | fixed |
| Debian | libmongocrypt | forky | 1.21.0-1 | fixed |
| Debian | libmongocrypt | trixie | 1.13.2-1+deb13u1 | vulnerable |
| Debian | libmongocrypt | bookworm | 1.7.2-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libmongocrypt | source | sid | 1.20.5-1 | not yet assigned | Not reported | Not reported |
| Debian | libmongocrypt | source | forky | 1.20.5-1 | not yet assigned | Not reported | Not reported |
| Debian | libmongocrypt | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | libmongocrypt | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
Notes
[trixie] libmongocrypt: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libmongocrypt0]Affected
Source package: [libmongocrypt]
Details (2)
1.7.2-1· amd64 · bookwormAffected
nvd · libmongocrypt · debian · bookworm
1.7.2-1· arm64 · bookwormAffected
nvd · libmongocrypt · debian · bookworm
- [libmongocrypt-dev]Affected
Source package: [libmongocrypt]
Details (2)
1.7.2-1· amd64 · bookwormAffected
nvd · libmongocrypt · debian · bookworm
1.7.2-1· arm64 · bookwormAffected
nvd · libmongocrypt · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-106429]
- [https://security-tracker.debian.org/tracker/CVE-2026-106429]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106429.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3830.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]