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CVE-2026-6691 MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow

🗓️ 06 May 2026 15:08:23Reported by mongodbType 
cvelist
 cvelist
🔗 www.cve.org👁 72 Views

MongoDB client library Cyrus security layer canonicalization causes heap overflow from unsafe username copying in a MongoDB uniform resource identifier with an 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
debiancve
Debian CVE
CVE-2026-6691
6 May 202615:08
–debiancve
euvd
EUVD
EUVD-2026-27838
6 May 202618:30
–euvd
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
[
  {
    "vendor": "MongoDB Inc.",
    "product": "MongoDB C Driver",
    "versions": [
      {
        "status": "affected",
        "version": "2.1.0",
        "lessThanOrEqual": "2.1.2",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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