CVE-2026-9740
published 2026-06-09CVE-2026-9740: A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message…
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.34%
26.3th percentile
A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mongodb | mongodb | >= 7.0.0 < 7.0.35 | 7.0.35 |
| mongodb | mongodb | >= 8.0.0 < 8.0.24 | 8.0.24 |
| mongodb | mongodb | >= 8.2.0 < 8.2.10 | 8.2.10 |
| mongodb | mongodb | >= 8.3.0 < 8.3.3 | 8.3.3 |
| mongodb | mongodb_server | >= 7.0.0 < 7.0.35 | 7.0.35 |
| mongodb | mongodb_server | >= 8.0.0 < 8.0.24 | 8.0.24 |
| mongodb | mongodb_server | >= 8.2.0 < 8.2.10 | 8.2.10 |
| mongodb | mongodb_server | >= 8.3.0 < 8.3.3 | 8.3.3 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
MongoDB Server up to 7.0.34/8.0.23/8.2.9/8.3.2 recursion (Nessus ID 320840 / WID-SEC-2026-1868)
vuldb·2026-06-13·CVSS 7.5
CVE-2026-9740 [HIGH] MongoDB Server up to 7.0.34/8.0.23/8.2.9/8.3.2 recursion (Nessus ID 320840 / WID-SEC-2026-1868)
A vulnerability described as critical has been identified in MongoDB Server up to 7.0.34/8.0.23/8.2.9/8.3.2. Affected by this issue is some unknown functionality. The manipulation results in uncontrolled recursion.
This vulnerability is cataloged as CVE-2026-9740. The attack may be launched remotely. There is no exploit available.
Upgrading the affected component is recommended.
GHSA
A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message.
ghsa_unreviewed·2026-06-10
CVE-2026-9740 [HIGH] CWE-674 A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message.
A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-09
Published