Which products and versions are affected by CVE-2025-14847?

Affected: Mongodb versions >= 4.4.0; mongod-5.0 (chainguard); mongod-6.0 (chainguard), among others. The full list is in the CVE brief.

Is CVE-2025-14847 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 28, 2025.

Is CVE-2025-14847 in the CISA KEV catalog?

Yes. It was added on Dec 29, 2025 with a federal remediation due date of Jan 19, 2026.

Is there a public exploit for CVE-2025-14847?

Public exploit code is available.

Is there a fix for CVE-2025-14847?

Fixed versions are available, including mongod-5.0 5.0.32-r0, mongod-6.0 6.0.27-r0, mongod-7.0 7.0.28-r0.

How urgently should CVE-2025-14847 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2025-14847

HighExploitedPublic exploit

Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client.

Published Apr 9, 2026 · Updated Aug 12, 2026 · Also known as BIT-mongodb-2025-14847, UBUNTU-CVE-2025-14847, USN-8160-1

Key Facts

Patch immediately

CVE-2025-14847 is a high-severity vulnerability (CVSS 8.7 v4) affecting Mongodb, mongod-5.0 (chainguard), mongod-6.0 (chainguard) and 5 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 28, 2025. Public exploit code is available.
EPSS estimates a 83% probability of exploitation in the next 30 days.
Fixed versions are available, including mongod-5.0 5.0.32-r0, mongod-6.0 6.0.27-r0, mongod-7.0 7.0.28-r0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

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/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 (30-day exploit likelihood)

83%

Higher than 99.6% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2025-14847 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Dec 29, 2025	Jan 19, 2026	Not reported
Industry KEV feed	Dec 28, 2025	Jan 19, 2026	Not reported
CIRCL KEV	Dec 29, 2025	Jan 19, 2026	Not reported
ENISA EUVD	Dec 29, 2025	n/a	Not reported

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

Affected Products

20 affected entries in total

Product	Affected versions	Fixed in
MongodbMongodb	>= 4.4.0	4.4.30
mongod-5.0chainguard	See advisory	5.0.32-r0
mongod-6.0chainguard	See advisory	6.0.27-r0
mongod-7.0chainguard	See advisory	7.0.28-r0
mongod-8.0chainguard	See advisory	8.0.17-r0

3 more affected products in the full CVE brief

Patched Releases

mongod-5.0

5.0.32-r0

mongod-6.0

6.0.27-r0

mongod-7.0

7.0.28-r0

mongod-8.0

8.0.17-r0

Mongodb

1:3.6.3-0ubuntu1.4+esm2, 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1, 4.4.30, 5.0.32, 6.0.27, 7.0.28, 8.0.17, 8.2.3

MongoDB Server

4.4.30, 5.0.32, 6.0.27, 7.0.28, 8.0.17, 8.2.3, 1:3.6.3-0ubuntu1.4+esm2, 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1

mongodb-clients

1:3.6.3-0ubuntu1.4+esm2, 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1

mongodb-server-core

1:3.6.3-0ubuntu1.4+esm2, 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1

Timeline

Added to Industry KEV feed
Dec 28, 2025
Added to CISA KEV
Dec 29, 2025
Added to CIRCL KEV
Dec 29, 2025
Added to ENISA EUVD
Dec 29, 2025
Publicly disclosed
Apr 9, 2026
Last updated
Aug 12, 2026

Weakness Type

CWE-130 Improper Handling of Length Parameter Inconsistency

References

advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2025/14xxx/CVE-2025-14847.json
advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-14847
advisoryhttps://ubuntu.com/security/CVE-2025-14847
advisoryUSN-8160-1
advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog

15 more references in the full CVE brief

FAQ

Common Questions.

Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client.
Affected: Mongodb versions >= 4.4.0; mongod-5.0 (chainguard); mongod-6.0 (chainguard), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 28, 2025.
Yes. It was added on Dec 29, 2025 with a federal remediation due date of Jan 19, 2026.
Public exploit code is available.
Fixed versions are available, including mongod-5.0 5.0.32-r0, mongod-6.0 6.0.27-r0, mongod-7.0 7.0.28-r0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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