CVE-2025-14847

Name: CVE-2025-14847
Creator: NVD / NIST
Published: 2025-12-19T11:15:49.277+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10Actively ExploitedEPSS 83.01%

Last modified Jun 17, 2026

CVE-2025-14847 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 83.01% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS 4.0

8.7/10

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

EPSS Probability

83.01%

99.6th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jan 19, 2026.

Weakness Enumeration

CWE-130

Affected Software

Vendor	Product	Versions
Mongodb	Mongodb	>= 3.6.0, < 4.4.30
Mongodb	Mongodb	>= 5.0.0, < 5.0.32
Mongodb	Mongodb	>= 6.0.0, < 6.0.27
Mongodb	Mongodb	>= 7.0.0, < 7.0.28
Mongodb	Mongodb	>= 8.0.0, < 8.0.17
Mongodb	Mongodb	>= 8.2.0, < 8.2.3

References

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

Timeline

Published: Dec 19, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-14847?

How severe is CVE-2025-14847?

CVE-2025-14847 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 83.01% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-14847?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-14847?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST