CVE-2025-14847

HIGH CISA KEV EPSS 99.6%
Published Dec 19, 20256mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
High
Find Similar
Published Dec 19, 2025 6mo ago
Last Modified Jun 17, 2026 2w ago
KEV Listed Dec 29, 2025 6mo ago
KEV Due Jan 19, 2026 164d overdue

Description

Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions prior to 8.2.3, MongoDB Server v6.0 versions prior to 6.0.27, MongoDB Server v5.0 versions prior to 5.0.32, MongoDB Server v4.4 versions prior to 4.4.30, MongoDB Server v4.2 versions greater than or equal to 4.2.0, MongoDB Server v4.0 versions greater than or equal to 4.0.0, and MongoDB Server v3.6 versions greater than or equal to 3.6.0.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

CISA Known Exploited Overdue 164d
Added
Dec 29, 2025
Due
Jan 19, 2026

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS Exploit Probability
99.6% percentile
Exploit & Patch Status
Actively Exploited (KEV)
Patch Available

Weaknesses 1

CWE-130

Affected Products 6

VendorProductVersionRange
mongodbmongodb*≥3.6.0  –  <4.4.30
mongodbmongodb*≥5.0.0  –  <5.0.32
mongodbmongodb*≥6.0.0  –  <6.0.27
mongodbmongodb*≥7.0.0  –  <7.0.28
mongodbmongodb*≥8.0.0  –  <8.0.17
mongodbmongodb*≥8.2.0  –  <8.2.3

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2025/12/29/21
    Mailing List
  • jira.mongodb.org https://jira.mongodb.org/browse/SERVER-115508
    Issue TrackingPatchVendor Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14847
    Third Party AdvisoryUS Government Resource
  • smartkeyss.com https://www.smartkeyss.com/post/mongobleed-pre-auth-memory-disclosure-via-op_compressed-in-mongodb-cve-2025-14847
    Technical DescriptionThird Party Advisory
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memory-exposure-in-mongodb-server
    ExploitThird Party Advisory
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-14847-mitigation-script-heap-memory-exposure-in-mongodb-server
    ExploitThird Party Advisory

Remediation

  • jira.mongodb.org https://jira.mongodb.org/browse/SERVER-115508
    Issue TrackingPatchVendor Advisory