CVE-Katalog
CVE-2026-6691
The MongoDB C Driver's Cyrus SASL integration performs unsafe string copying during username canonicalization, enabling a heap buffer overflow before any authentication or network traffic. This may be
- Schweregrad
- High · CVSS 8.6
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.18% · Oct 23, 2026
The MongoDB C Driver's Cyrus SASL integration performs unsafe string copying during username canonicalization, enabling a heap buffer overflow before any authentication or network traffic. This may be triggered by passing untrusted input in the username of a MongoDB URI with authMechanism=GSSAPI.
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 | fixed |
| Debian | mongo-c-driver | bookworm | 1.23.1-1+deb12u3 | fixed |
| Cpe | c_driver | Not reported | 2.1.2 | fixed |
| Ubuntu | mongo-c-driver | pro | 1.24.3-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.24.4-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.25.1-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.25.2-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.25.4-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1.1ubuntu1 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1.1ubuntu2 | vulnerable |
| Ubuntu | mongo-c-driver | pro | 1.26.0-1.1ubuntu2+esm1 | vulnerable |
| Ubuntu | mongo-c-driver | 25.10 | 1.30.2-1 | vulnerable |
| Ubuntu | mongo-c-driver | 25.10 | 1.30.4-1ubuntu1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mongo-c-driver | source | sid | 2.2.0-1 | not yet assigned | Not reported | Not reported |
| Debian | mongo-c-driver | source | forky | 2.2.0-1 | not yet assigned | Not reported | Not reported |
| Debian | mongo-c-driver | source | trixie | 1.30.4-1+deb13u2 | not yet assigned | Not reported | Not reported |
| Debian | mongo-c-driver | source | bookworm | 1.23.1-1+deb12u3 | not yet assigned | Not reported | Not reported |
| Cpe | c_driver | cpe | Not reported | 2.1.2 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libbson-1.0-0]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libbson-dev]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libbson-doc]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· all · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· all · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libmongoc-1.0-0]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libmongoc-dev]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· amd64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· arm64 · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
- [libmongoc-doc]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.23.1-1+deb12u3· all · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
1.23.1-1+deb12u3· all · bookwormBehoben · Behoben:
1.23.1-1+deb12u3nvd · mongo-c-driver · debian · bookworm; nvd · mongo-c-driver · debian · 12
[Debian 13 (Trixie)]
- [libbson-1.0-0t64]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
- [libbson-dev]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
- [libbson-doc]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· all · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· all · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
- [libmongoc-1.0-0t64]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
- [libmongoc-dev]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· amd64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· arm64 · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
- [libmongoc-doc]Behoben
Quellpaket: [mongo-c-driver]
Details (2)
1.30.4-1+deb13u2· all · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
1.30.4-1+deb13u2· all · trixieBehoben · Behoben:
1.30.4-1+deb13u2nvd · mongo-c-driver · debian · 13
Beobachtet:
Referenzen
- [https://nvd.nist.gov/vuln/detail/CVE-2026-6691]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-6691]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-6691]
- [https://security-tracker.debian.org/tracker/CVE-2026-6691]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1386.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]