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NVD / CVE Program· CNA mongodb

CVE-2025-14847: Zlib compressed protocol header length confusion may allow memory read

Noroxi assessment

Priority: Now (action score 89/100)

  • CISA has confirmed exploitation in the wild (Dec 29, 2025). Remediation deadline for US federal agencies: Jan 19, 2026.
  • A ready-made attack module is public (Metasploit, Nuclei); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 83.2% (FIRST EPSS); higher than 99.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.

Patch today or shut off access. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

HighCVSS 8.7 · v4.0KEVWeaponized No fix recorded
Published
Dec 19, 2025
Updated
Jun 17, 2026
EPSS
83.2% · 99th percentile

Report tools

JSON

Action score

89

Now

Patch today or shut off access.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
30 / 30 · Listed
EPSS
25 / 30 · 83.2%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · mongodb
8.7
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Dec 29, 2025. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jan 19, 2026.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-14847

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mongodbmongodb

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • mongodb mongodb3.6.0 and later · before 4.4.30
  • mongodb mongodb5.0.0 and later · before 5.0.32
  • mongodb mongodb6.0.0 and later · before 6.0.27
  • mongodb mongodb7.0.0 and later · before 7.0.28
  • mongodb mongodb8.0.0 and later · before 8.0.17
  • mongodb mongodb8.2.0 and later · before 8.2.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mongodb). Independent of NVD's CPE analysis and usually ahead of it.

  • MongoDB Inc. MongoDB Server

    • 4.2, 4.0, 3.6affected
    • 8.2 and later · before 8.2.3affected
    • 8.0 and later · before 8.0.17affected
    • 7.0 and later · before 7.0.28affected
    • 6.0 and later · before 6.0.27affected
    • 5.0 and later · before 5.0.32affected
    • 4.4 and later · before 4.4.30affected

Same product

mongodb: all records

Other highest-scoring records for the same primary product.

  • CVE-2013-1892MongoDB before 2.0.9 and 2.2.x before 2.2.4 does not properly validate requests to the nativeHelper function in SpiderMonkey, which allows r
    40Plan
  • CVE-2025-3085MongoDB Server running on Linux may allow unexpected connections where intermediate certificates are revoked
    39Monitor
  • CVE-2024-8654MongoDB Server may access non-initialized region of memory leading to unexpected behaviour
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-13644Nov 25, 2025 · MongoDB may be susceptible to Invariant Failure due to batched delete
    28Monitor
  • ← EarlierCVE-2025-14345Dec 9, 2025 · Cross-Shard Failovers May Lead to Partial Transaction Commit in MongoDB Server
    9Monitor
  • Later →CVE-2026-1847Feb 10, 2026 · MongoDB Server may crash when inserting large documents
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×42

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Metasploit moduleauxiliary/scanner/mongodb/cve_2025_14847_mongobleedMongoDB Memory Disclosure (CVE-2025-14847) - Mongobleedauxiliary2025-12-19
Nuclei detection templateNuclei template CVE-2025-14847 —
Proof-of-concept repository on GitHubstars:12025-07-30
Proof-of-concept repository on GitHubstars:152025-12-26
Proof-of-concept repository on GitHubstars:272025-12-26
Proof-of-concept repository on GitHubstars:352025-12-27
Proof-of-concept repository on GitHubstars:02025-12-27
Proof-of-concept repository on GitHubstars:362025-12-27
Proof-of-concept repository on GitHubstars:22025-12-27
Proof-of-concept repository on GitHubstars:02025-12-27
Proof-of-concept repository on GitHubstars:02025-12-28
Proof-of-concept repository on GitHubstars:32025-12-28

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-142 d
  2. Metasploitsame day
  3. Published
  4. CISA KEV+10 d
  5. TodayNov 1, 2026+317 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-130 · Improper Handling of Length Parameter Inconsistency

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records