CVE-2026-76797Network attack vectorHinoki check available

Report data disclosure via unneutralized CSV formulas

Published Aug 28, 2026 · Updated Aug 28, 2026

CSV formula injection in MongoSQL Transition Readiness Tool before 1.1.3 allows remote authenticated users to expose report data. Generated CSV reports copy database and collection names beginning with =, +, -, or @ into cells without neutralizing formula syntax. Exploitation requires cluster write privileges, report generation for the affected namespace, and an operator opening the CSV in a spreadsheet.

CVSS severity5.8
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

CSV formula injection in MongoSQL Transition Readiness Tool before 1.1.3 allows remote authenticated users to expose report data. Generated CSV reports copy database and collection names beginning with =, +, -, or @ into cells without neutralizing formula syntax. Exploitation requires cluster write privileges, report generation for the affected namespace, and an operator opening the CSV in a spreadsheet.

The record

CVE
CVE-2026-76797
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
MongoDB
Product
MongoSQL Transition Readiness Tool
Classifications
CWE-1236, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=1.0.0 <1.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MongoDB · MongoSQL Transition Readiness Toolversion=1.0.0 <1.1.3

Published CVSS scores

5.8MongoDBCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
6.3MongoDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1236Improper Neutralization of Formula Elements in a CSV File
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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