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EUVD-2026-27838

🗓️ 06 May 2026 18:30:30Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 25 Views

The MongoDB C Driver Cyrus SASL integration performs unsafe username canonicalization, causing a heap overflow from untrusted URI username with authentication mechanism.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-6691
6 May 202615:08
–attackerkb
astralinux
AstraLinux
Astra Linux – Vulnerability in mongo-c-driver
14 Sep 202612:41
–astralinux
bdu_fstec
BDU FSTEC
Cyrus SASL MongoDB DoS
28 Aug 202600:00
–bdu_fstec
circl
Circl
CVE-2026-6691
6 May 202617:01
–circl
cnnvd
CNNVD
MongoDB C Driver security vulnerabilities
6 May 202600:00
–cnnvd
cve
CVE
CVE-2026-6691
6 May 202615:08
–cve
cvelist
Cvelist
CVE-2026-6691 MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow
6 May 202615:08
–cvelist
debiancve
Debian CVE
CVE-2026-6691
6 May 202615:08
–debiancve
mend
Mend
CVE-2026-6691
6 May 202615:08
–mend
mongodb
MongoDB
MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow
6 May 202615:08
–mongodb
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "fb7accd0-c1f3-3ed3-b010-4fbe20cf2c5f",
        "vendor": {
          "name": "MongoDB Inc."
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "f64e51a4-30cd-3d1f-ae8a-b9702afe7ae3",
        "product": {
          "name": "MongoDB C Driver"
        },
        "product_version": "2.1.0 ≤2.1.2"
      }
    ]
  }
]

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06 May 2026 18:30Current
7.6High risk
Vulners AI Score7.6
CVSS 48.6
CVSS 3.17.8
EPSS0.00184
SSVC
25