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Persistent client crash loop via undersized FLE2 insert-update ciphertext in decryption path

🗓️ 03 Sep 2026 14:57:35Reported by MongoDBType 
mongodb
 mongodb
🔗 www.mongodb.com👁 14 Views

Crash loop in FLE2 client encryption library via undersized insert-update ciphertext in decryption.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-84971
3 Sep 202615:42
–circl
cve
CVE
CVE-2026-84971
3 Sep 202614:57
–cve
cvelist
Cvelist
CVE-2026-84971 Persistent client crash loop via undersized FLE2 insert-update ciphertext in decryption path
3 Sep 202614:57
–cvelist
debiancve
Debian CVE
CVE-2026-84971
3 Sep 202614:57
–debiancve
euvd
EUVD
EUVD-2026-70507
3 Sep 202614:57
–euvd
fedora
Fedora
[SECURITY] Fedora 45 Update: libmongocrypt-1.20.4-1.fc45
13 Sep 202600:17
–fedora
nessus
Tenable Nessus
Fedora 45 : libmongocrypt (2026-0664f1b41b)
12 Sep 202600:00
–nessus
nessus
Tenable Nessus
Linux Distros Unpatched Vulnerability : CVE-2026-84971
4 Sep 202600:00
–nessus
nvd
NVD
CVE-2026-84971
3 Sep 202615:17
–nvd
osv
OSV
DEBIAN-CVE-2026-84971
3 Sep 202615:17
–osv
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Vulners
Node
mongodblibmongocryptRange1.7.0–1.20.4

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03 Sep 2026 15:10Current
5.2Medium risk
Vulners AI Score5.2
CVSS 3.16.5
CVSS 47.1
EPSS0.00259
SSVC
14