CVE-2025-14847
Confirmed PUBLISHEDZlib compressed protocol header length confusion may allow memory read
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Dec 19, 2025
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 8.7 High
- EPSS
- 83.0%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| MongoDB Inc. |
MongoDB Server
|
8.2 to < 8.2.3 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
8.0 to < 8.0.17 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
7.0 to < 7.0.28 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
6.0 to < 6.0.27 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
5.0 to < 5.0.32 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
4.4 to < 4.4.30 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
4.2 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
4.0 |
Affected |
| MongoDB Inc. |
MongoDB Server
|
3.6 |
Affected |
CVE References
- jira.mongodb.org/browse/SERVER-115508 jira.mongodb.org · CVE Record https://jira.mongodb.org/browse/SERVER-115508
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:47 UTC |
| CISA | 2026-06-02 14:04 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2025/CVE-2025-14847.yaml | Jun 01, 2026 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:47:16 UTC · CVE
Proof of concept available
Recorded 2026-06-12 14:21:14 UTC · Nuclei Templates
Weaknesses (CWE)
-
Improper Handling of Length Parameter Inconsistency
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2025/CVE-2025-14847.yaml | Jun 01, 2026 |
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
nuclei · Created Unknown
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:21 UTC about 1 month ago14:21 UTC · about 1 month ago
Public PoC available
Public proof-of-concept code published
-
14:04 UTC about 2 months ago14:04 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
15:34 UTC about 2 months ago15:34 UTC · about 2 months ago
Nuclei template available
Scanner coverage available
-
10:47 UTC about 2 months ago10:47 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
11:00 UTC 7 months ago11:00 UTC · 7 months ago
CVE published
Vulnerability disclosed publicly
-
18:56 UTC 7 months ago18:56 UTC · 7 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2025-14847
{
"cve_id": "CVE-2025-14847",
"title": "Zlib compressed protocol header length confusion may allow memory read",
"affected_vendor": "MongoDB Inc.",
"affected_product": "MongoDB Server",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 8.7,
"epss_score": 0.83007,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}