DEBIAN-CVE-2026-6691

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2026-6691
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6691.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-6691
Upstream
Published
2026-05-06T16:16:11Z
Modified
2026-09-14T17:03:22Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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 CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / mongo-c-driver

Package

Name
mongo-c-driver
Purl
pkg:deb/debian/mongo-c-driver?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.23.1-1+deb12u3

Affected versions

1.*
1.23.1-1
1.23.1-1+deb12u1
1.23.1-1+deb12u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6691.json"

Debian:13 / mongo-c-driver

Package

Name
mongo-c-driver
Purl
pkg:deb/debian/mongo-c-driver?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.30.4-1+deb13u2

Affected versions

1.*
1.30.4-1
1.30.4-1+deb13u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6691.json"

Debian:14 / mongo-c-driver

Package

Name
mongo-c-driver
Purl
pkg:deb/debian/mongo-c-driver?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2.0-1

Affected versions

1.*
1.30.4-1
2.*
2.0.2-1
2.1.0-1
2.1.1-1
2.1.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6691.json"