CVE-2026-9753CWE-1287

Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.

High · published June 9, 2026

CVSS v4.0
7.2
EPSS
1%
Percentile
43.4
In the wild
Unconfirmed
What it is

The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authenticated user with access to the aggregate command.

The record
Technical detail
CVSS v4.0
7.2 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00521 · 43.4th percentile
Weakness
CWE-1287 · Improper Validation of Specified Type of Input
Published
2026-06-09T22:30Z
EPSS history
Timeline
  • 09 JUN 22:30Z
    Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.
    cvelistv5