CVE-2026-8336

mediumpriority · track · 26EPSS 0.003 · 17 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (17th) EPSS

CVSS 6.5 · medium

Is it mine?

22 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service. This issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

cvss

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

7.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.2–7.7

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

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · cna@mongodb.comexploitability 1.6 · impact 5.9

v4.07.7highCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/AU:N/R:A/V:D/RE:M/U:Redsecondary · ENISA EU

v4.07.7highCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/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:N/R:A/V:D/RE:M/U:Redsecondary · cna@mongodb.com

v4.05.2mediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/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:N/R:A/V:D/RE:M/U:Redsecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416US

affected products (22)

Products and version ranges known to be affected.

Open Source MongoDB <7.0.34all versionscert_bundDE
Open Source MongoDB <8.0.23all versionscert_bundDE
Open Source MongoDB <8.2.9all versionscert_bundDE
Open Source MongoDB <8.3.2all versionscert_bundDE
Splunk Splunk Enterprise <10.0.8all versionscert_bundDE
Splunk Splunk Enterprise <10.2.5all versionscert_bundDE
Splunk Splunk Enterprise <10.4.1all versionscert_bundDE
Splunk Splunk Enterprise <9.4.13all versionscert_bundDE
Open Source MongoDB< 7.0.34cert_bundDE
Open Source MongoDB< 8.0.23cert_bundDE
Open Source MongoDB< 8.2.9cert_bundDE
Open Source MongoDB< 8.3.2cert_bundDE
Splunk Splunk Enterprise< 10.0.8cert_bundDE
Splunk Splunk Enterprise< 10.2.5cert_bundDE
Splunk Splunk Enterprise< 10.4.1cert_bundDE
Splunk Splunk Enterprise< 9.4.13cert_bundDE
MongoDB, Inc. MongoDB Server8.2 → 8.2.9enisa_euvdEU
MongoDB, Inc. MongoDB Server8.3 → 8.3.2enisa_euvdEU
mongodb mongodb8.2.0 → 8.2.9nvdUScpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
mongodb mongodb8.3.0 → 8.3.2nvdUScpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*

showing 20 of 22

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1516MongoDB: Mehrere SchwachstellenDeutsch2026-05-12csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in MongoDB ausnutzen, um beliebigen Programmcode auszuführen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.
BIT-mongodb-2026-8336Post-authentication use-after-free error in $_internalJsEmit and mapreduce commands2026-05-19vendor · osvUS
After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service. This issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2026-05-13modified 2026-10-26

references (6)

External citations — patches, advisories, analysis.

scry

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