CVE-2026-82059

mediumpriority · track · 26EPSS 0.004 · 30 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.37% (30th) EPSS

CVSS 6.5 · medium

Is it mine?

12 products

Check your exposure

Who says so?

3 sources

cert_bund · nvd · osv

EPSS · scored 2026-10-27

An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.3–6.5

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · cna@mongodb.comexploitability 1.6 · impact 3.6

v4.06mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/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:Xsecondary · cna@mongodb.com

v4.02.3lowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-617US

affected products (12)

Products and version ranges known to be affected.

Open Source MongoDB Server <7.0.41all versionscert_bundDE
Open Source MongoDB Server <8.0.30all versionscert_bundDE
Open Source MongoDB Server <8.3.9all versionscert_bundDE
Open Source MongoDB≤ Server <7.0.41cert_bundDE
Open Source MongoDB≤ Server <8.0.30cert_bundDE
Open Source MongoDB≤ Server <8.3.9cert_bundDE
mongodb mongodb7.0.0 → 7.0.41nvdUScpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
mongodb mongodb8.0.0 → 8.0.30nvdUScpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
mongodb mongodb8.3.0 → 8.3.9nvdUScpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
Bitnami mongodb7.0.0 → 7.0.41osvUSpkg:bitnami/mongodb
Bitnami mongodb8.0.0 → 8.0.30osvUSpkg:bitnami/mongodb
Bitnami mongodb8.3.0 → 8.3.9osvUSpkg:bitnami/mongodb

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3236MongoDB Server: Mehrere SchwachstellenDeutsch2026-09-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in MongoDB Server ausnutzen, um erweiterte Berechtigungen, einschließlich Administratorrechte, zu erlangen und beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen oder einen Denial-of-Service-Zustand auszulösen.
BIT-mongodb-2026-82059Improper Access Restriction of Internal Aggregation Expression in MongoDB Server Leads to Assertion Failure and Denial of Service2026-09-17vendor · osvUS
An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients.

sources

Which sources assert this record, and when.

cert_bund nvd osv NVD CVE.org MITRE

published 2026-09-08modified 2026-09-16

references (1) nvd

External citations — patches, advisories, analysis.

https://jira.mongodb.org/browse/SERVER-130571Vendor AdvisoryIssue Tracking

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