Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-05-06 | 3 | Disclosure2Patch1 |
| 2026-05-13 | 1 | General1 |
🚨 CVE-2026-6691: mongo-c-driver Vulnerability A newly disclosed flaw in MongoDB’s C driver may impact apps using MongoDB connectivity. Security fixes are already rolling out across Linux distributions. Patch affected packages ASAP. #MongoDB #CVE #CyberSecurity
Post summary
A new flaw in MongoDB’s C driver, CVE‑2026‑6691, has been disclosed and vendor patches are already being disseminated to Linux distributions.
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… https://www.cve.org/CVERecord?id=CVE-2026-6691
Post summary
The entry announces a heap buffer overflow in MongoDB C Driver’s Cyrus SASL integration, highlighting the vulnerability type and linking to the official CVE record.
⚠️ Vulnerabilidades en productos MongoDB ❗ CVE-2026-8063 ❗ CVE-2026-6691 ➡️ Más info: https://www.cert.gov.py/vulnerabilidades-en-productos-mongodb-2/ https://t.co/fBMnvP3jCv
Post summary
The tweet lists two MongoDB CVEs and provides links for more information but offers no technical or exploit details.
🚨*CVE* 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… https://www.cve.org/CVERecord?id=CVE-2026-6691 ----- Traducción: CVE-2026-6691 La … http://infoflow.cloud`
Post summary
The post announces CVE-2026-6691, describing a heap buffer overflow in the MongoDB C Driver’s Cyrus SASL integration, but makes no mention of PoCs, exploits, active use, or patches.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | mongodb | c_driver | - | mongodb | - |