CVE-2026-106437
published 2026-10-08CVE-2026-106437: The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can…
PriorityP429medium6.2CVSS 3.1
AVLACHPRNUINSUCLILAH
EPSS
0.10%
0.7th percentile
The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to pass an undersized value to bson_reserve_buffer and then perform an affected operation.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mongodb | c_driver | >= 1.4.0 < 1.30.13 | 1.30.13 |
| mongodb | c_driver | >= 2.0.0 < 2.5.6 | 2.5.6 |
CVSS provenance
nvdv3.16.2MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
nvdv4.05.9MEDIUMCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/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.
No advisories linked to this vulnerability.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer [epel-all]
bugzilla·2026-10-09·CVSS 6.2
CVE-2026-106437 [MEDIUM] CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer [epel-all]
CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to p
Bugzilla
CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer [fedora-all]
bugzilla·2026-10-09·CVSS 6.2
CVE-2026-106437 [MEDIUM] CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer [fedora-all]
CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to
Bugzilla
CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer
bugzilla·2026-10-08·CVSS 6.2
CVE-2026-106437 [MEDIUM] CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer
CVE-2026-106437 mongo-c-driver: mongo-c-driver: Denial of Service via integer underflow in bson_reserve_buffer
The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to pass an undersized value to bson_reserve_buffer and then perform an affected operation.
2026-10-08
Published