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High · 7.5 Known exploited Scanner template Public exploit CVE-2025-14847 EUVD-2025-204529GHSA-4742-mr57-2r9j

Zlib compressed protocol header length confusion may allow memory read

Published Dec 19, 2025 · Updated Feb 26, 2026 · Assigned by mongodb

Vendor: MongoDB Product: MongoDB Server Package: mongodb Ecosystem: Ubuntu

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.

Affected products

VendorProductAffectedFixed
MongoDB MongoDB Server 8.2 – < 8.2.3, 8.0 – < 8.0.17, 7.0 – < 7.0.28, 6.0 – < 6.0.27, 5.0 – < 5.0.32, 4.4 – < 4.4.30, 4.2, 4.0, 3.6 8.2.3

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu Pro 20.04 LTS mongodb 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1 USN-8160-1
Ubuntu Pro 18.04 LTS mongodb 1:3.6.3-0ubuntu1.4+esm2 USN-8160-1

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

GitHub 38 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 5

References