CASCACascade Atlas

Evidence dossier

CVE-2025-14847

Zlib compressed protocol header length confusion may allow memory read

77.0–95.0Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Dec 19, 2025
Updated
Feb 26, 2026
Evidence coverage
72%
CISA KEVCatalog member

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

FIRST EPSS83.01%

2026-07-18 · v2026.06.15 · percentile 99.6%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

mongodboriginal assertion
container

Zlib compressed protocol header length confusion may allow memory read

CISA KEVoriginal assertion
observed_exploitation

MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.830070000000; percentile 0.996390000000

Applicability

Cited product scope

Trace impact →
MongoDB Inc.MongoDB Server
[{"status": "affected", "version": "8.2", "lessThan": "8.2.3", "versionType": "custom"}, {"status": "affected", "version": "8.0", "lessThan": "8.0.17", "versionType": "custom"}, {"status": "affected", "version": "7.0", "lessThan": "7.0.28", "versionType": "custom"}, {"status": "affected", "version": "6.0", "lessThan": "6.0.27", "versionType": "custom"}, {"status": "affected", "version": "5.0", "lessThan": "5.0.32", "versionType": "custom"}, {"status": "affected", "version": "4.4", "lessThan": "4.4.30", "versionType": "custom"}, {"status": "affected", "version": "4.2", "versionType": "custom"}, {"status": "affected", "version": "4.0", "versionType": "custom"}, {"status": "affected", "version": "3.6", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*; start including 3.6.0; end excluding 4.4.30supported
Unknown vendorUnknown product
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*; start including 5.0.0; end excluding 5.0.32supported
Unknown vendorUnknown product
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*; start including 6.0.0; end excluding 6.0.27supported
Unknown vendorUnknown product
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*; start including 7.0.0; end excluding 7.0.28supported
Unknown vendorUnknown product
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*; start including 8.0.0; end excluding 8.0.17supported
Unknown vendorUnknown product
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*; start including 8.2.0; end excluding 8.2.3supported

Assessments

CVSS by origin

8.7
cna@mongodb.comCVSS 4.0 · role SecondaryCVSS: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
7.5
cna@mongodb.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7
mongodbCVSS 4.0 · role unknownCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5
mongodbCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.