CVE-2026-82064Network attack vector

Unauthenticated service crash via read concern assertion

Published Sep 8, 2026 · Updated Sep 8, 2026

DoS in MongoDB Server 7.0.0 through 7.0.40, 8.0.0 through 8.0.29, and 8.3.0 through 8.3.8 allows remote attackers to crash replica members. Read concern processing reaches an assertion whose internal-state assumptions do not hold for every replica set member configuration. The request needs no authentication, but only the affected member process terminates; no data read or write impact is reported.

CVSS severity8.7
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DoS in MongoDB Server 7.0.0 through 7.0.40, 8.0.0 through 8.0.29, and 8.3.0 through 8.3.8 allows remote attackers to crash replica members. Read concern processing reaches an assertion whose internal-state assumptions do not hold for every replica set member configuration. The request needs no authentication, but only the affected member process terminates; no data read or write impact is reported.

The record

CVE
CVE-2026-82064
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
MongoDB
Product
MongoDB Server
Classifications
CWE-617, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.0 <7.0.41
  2. Affected versionversion=8.0.0 <8.0.30
  3. Affected versionversion=8.3.0 <8.3.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MongoDB · MongoDB Serverversion=7.0.0 <7.0.41; version=8.0.0 <8.0.30; version=8.3.0 <8.3.9

Published CVSS scores

8.7MongoDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5MongoDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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