What is CVE-2025-14847?
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.
The record classifies CVE-2025-14847 under weakness class CWE-130. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 297 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.5 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS v4.0 base score
- 8.7
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 - EPSS (FIRST)
- 83.2% probability of exploitation in the next 30 days, higher than 99.6% of all scored CVEs
- CISA KEV
- Listed since 2025-12-29, federal remediation deadline 2026-01-19
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2025-12-19, last modified 2026-02-26
Is CVE-2025-14847 being exploited?
CISA added CVE-2025-14847 to the Known Exploited Vulnerabilities catalog on 2025-12-29, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-01-19 under BOD 22-01. Weaponised exploit code for CVE-2025-14847 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (network/cves/2025/CVE-2025-14847.yaml). It currently carries a trending score of 60 in the Threadlinqs vulnerability feed.
- Black1hp/mongobleed-scanner (github)
- cybertechajju/CVE-2025-14847_Expolit (github)
- ProbiusOfficial/CVE-2025-14847 (github)
- onewinner/CVE-2025-14847 (github)
- Security-Phoenix-demo/mongobleed-exploit-CVE-2025-14847 (github)
- codeb0ssx/CVE-2025-14847-PoC (github)
- joshuavanderpoll/CVE-2025-14847 (github)
- franksec42/mongobleed-exploit-CVE-2025-14847 (github)
Affected products and versions
- MongoDB Inc.: MongoDB Server
How to fix CVE-2025-14847
Because CVE-2025-14847 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-01-19. No vendor patch reference has been recorded for CVE-2025-14847 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2025-14847
3 tracked threats in the Threadlinqs corpus reference CVE-2025-14847, either in the campaign’s CVE list or as an indicator on the campaign record.
- ChocoPoC RAT Campaign Uses Malicious PoC-Exploit Python Packages to Backdoor Security Researchers — HIGH · 2026-07-02
- ChocoPoC Campaign: Trojanised PoC Exploits and PyPI Packages Deliver Python RAT Using Mapbox Datasets API as Dead-Drop C2 — HIGH · 2026-07-02
- ChocoPoC: Python RAT Distributed via Trojanized PoC Exploits Targeting Security Researchers — HIGH · 2026-07-01
Sources
Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on .