CVE-2026-120678

HIGH
MEDIUM Priority: 0.03 BB Relevance: 77/100
Published: 2026-11-03 Modified: 2026-11-03 First seen: 2026-11-03 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: X
AT: None
VC: None
VI: None
VA: High

Description

A memory management flaw in the MongoDB C Driver's handling of compressed responses may cause the client library to hold on to memory that is never released. An unauthenticated party that controls the database endpoint a client application connects to may cause repeated, unbounded memory growth in that application, which may result in the application becoming unavailable. No credentials, transport security settings, or user interaction are required.

Affected Software (6)

VendorProductVersion
MongoDB C Driver 1.25.0
MongoDB C Driver 2.0.0
MongoDB C Driver 1.25.0
MongoDB C Driver 2.0.0
MongoDB C Driver 1.25.0
MongoDB C Driver 2.0.0

References & Advisories (1)

Bug Bounty Relevance

77 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.7 / 10.0 v4.0
CVSS: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

EPSS — Exploitation Probability

0.39%
Raw Score 0.003890
Percentile 33.5%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00389
2026-11-13
0.00389
2026-11-12
0.00389
2026-11-10
0.00389
2026-11-09
0.00389
2026-11-08
0.00389
2026-11-07
0.00389
2026-11-06
0.00389
2026-11-05
0.00389
2026-11-04
0.00389

Intelligence Sources

mitre ref →
nvd ref →