NVD / CVE Program· CNA mongodb

CVE-2026-82056: Race Condition in MongoDB Server Text Index Query Parsing Leads to Heap Use-After-Free and Denial of Service

Noroxi assessment

Priority: Monitor (action score 24/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.33% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: MongoDB MongoDB Server 7.0.41, 8.0.30, 8.3.9.

Low priority for now. Upgrade to MongoDB MongoDB Server 7.0.41, 8.0.30, 8.3.9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A race condition in MongoDB server's text index query parsing can cause a heap use-after-free read when handling upsert retry paths. Under certain concurrent index lifecycle operations, a raw pointer to internal text index metadata may be dereferenced after the underlying structures have been freed, leading to a server crash. An authenticated user with readWrite privileges can trigger this condition through specific concurrent text-search and index management operations, resulting in denial of service for all connected clients. This

MediumCVSS 6.0 · v4.0—No exploit Fix available

EUVD-2026-72943

Published: Sep 8, 2026
Updated: Sep 16, 2026
EPSS: 0.3% · 26th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 24 / 40 · 6.0 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · mongodb: 6.0; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
mongodb	mongodb	cpe:2.3:a:mongodb:mongodb

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

mongodb mongodb7.0.0 and later · before 7.0.41
mongodb mongodb8.0.0 and later · before 8.0.30
mongodb mongodb8.3.0 and later · before 8.3.9

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mongodb). Independent of NVD's CPE analysis and usually ahead of it.

MongoDB MongoDB Server
- 8.3.0 and later · before 8.3.9affected · semver
- 8.0.0 and later · before 8.0.30affected · semver
- 7.0.0 and later · before 7.0.41affected · semver

Same product

mongodb: all records

Other highest-scoring records for the same primary product.

CVE-2025-14847Zlib compressed protocol header length confusion may allow memory readKEV
89Now
CVE-2013-1892MongoDB before 2.0.9 and 2.2.x before 2.2.4 does not properly validate requests to the nativeHelper function in SpiderMonkey, which allows r
40Plan
CVE-2025-3085MongoDB Server running on Linux may allow unexpected connections where intermediate certificates are revoked
39Monitor

Published before and after this one in the same product

← EarlierCVE-2026-82054Sep 8, 2026 · Uncontrolled Resource Consumption in MongoDB Server JSON Pointer Parser Leads to Denial of Service
28Monitor
← EarlierCVE-2026-82055Sep 8, 2026 · Null Pointer Dereference in MongoDB Server 2dsphere Index Key Generation Leads to Denial of Service
28Monitor
Later →CVE-2026-82057Sep 8, 2026 · Type Confusion in MongoDB Server WiredTiger Storage Engine via Custom Collection Configuration Leads to Persistent Denial of Service
28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
MongoDB MongoDB Server	7.0.41	Vendor (CNA)
MongoDB MongoDB Server	8.0.30	Vendor (CNA)
MongoDB MongoDB Server	8.3.9	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2025-6706439 days apartRunning certain aggregation operations with the SBE engine may lead to unexpected behavior on MongoDB Server
35Monitor
CVE-2026-4148175 days apartExpressionContext use-after-free in classic engine $lookup and $graphLookup aggregation operators
34Monitor
CVE-2026-1869228 days apartUse-After-Free in MongoDB Timeseries Bucket Handling Leads to Denial of Service and Potential Remote Code Execution
30Monitor
CVE-2026-1870628 days apartUse-After-Free in MongoDB $graphLookup Aggregation Stage Leads to Denial of Service and Potential Remote Code Execution
30Monitor
CVE-2026-8336118 days apartPost-authentication use-after-free error in $_internalJsEmit and mapreduce commands
30Monitor
CVE-2026-820610 days apartUse-After-Free in MongoDB Server Query Execution Memory Tracking Subsystem Leads to Denial of Service
28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

MongoDBHackerOne · paid

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: High
Privileges required: Low
User interaction: None
Scope: X

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:4.0/AV:N/AC:H/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:X

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

jira.mongodb.org/browse/SERVER-130306

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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