CVE-2026-9101Network attack vector

Command execution via polluted CSV file path

Published May 20, 2026 · Updated May 20, 2026

Prototype pollution in MongoDB Compass 1.36.3 through 1.49.5 allows remote attackers to execute commands through a crafted CSV import. During CSV parsing, attacker-controlled fields pollute object prototypes, allowing an untrusted file path—but not command arguments—to flow into Electron's shell.openExternal handler. Execution requires the user to import the crafted file and then perform the specific follow-on interaction that opens the polluted path.

CVSS severity5.3
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in MongoDB Compass 1.36.3 through 1.49.5 allows remote attackers to execute commands through a crafted CSV import. During CSV parsing, attacker-controlled fields pollute object prototypes, allowing an untrusted file path—but not command arguments—to flow into Electron's shell.openExternal handler. Execution requires the user to import the crafted file and then perform the specific follow-on interaction that opens the polluted path.

The record

CVE
CVE-2026-9101
Published
May 20, 2026
Updated
May 20, 2026
Vendor
MongoDB
Product
MongoDB Compass
Classifications
CWE-1321, CAPEC-1, CAPEC-77, CAPEC-180, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.36.3
  2. Affected versionversion=1.36.4
  3. Affected versionversion=1.37.0
  4. Affected versionversion=1.38.0
  5. Affected versionversion=1.38.1
  6. Affected versionversion=1.38.2
  7. Affected versionversion=1.39.0
  8. Affected versionversion=1.39.1
  9. Affected versionversion=1.39.2
  10. Affected versionversion=1.39.3
  11. Affected versionversion=1.39.4
  12. Affected versionversion=1.40.0
  13. Affected versionversion=1.40.1
  14. Affected versionversion=1.40.2
  15. Affected versionversion=1.40.3
  16. Affected versionversion=1.40.4
  17. Affected versionversion=1.41.0
  18. Affected versionversion=1.42.0
  19. Affected versionversion=1.42.1
  20. Affected versionversion=1.42.2
  21. Affected versionversion=1.42.3
  22. Affected versionversion=1.42.5
  23. Affected versionversion=1.43.0
  24. Affected versionversion=1.43.1
  25. Affected versionversion=1.43.2
  26. Affected versionversion=1.43.3
  27. Affected versionversion=1.43.4
  28. Affected versionversion=1.43.5
  29. Affected versionversion=1.43.6
  30. Affected versionversion=1.44.0
  31. Affected versionversion=1.44.3
  32. Affected versionversion=1.44.4
  33. Affected versionversion=1.44.5
  34. Affected versionversion=1.44.6
  35. Affected versionversion=1.44.7
  36. Affected versionversion=1.45.0
  37. Affected versionversion=1.45.1
  38. Affected versionversion=1.45.2
  39. Affected versionversion=1.45.3
  40. Affected versionversion=1.45.4
  41. Affected versionversion=1.46.0
  42. Affected versionversion=1.46.1
  43. Affected versionversion=1.46.10
  44. Affected versionversion=1.46.11
  45. Affected versionversion=1.46.2
  46. Affected versionversion=1.46.3
  47. Affected versionversion=1.46.4
  48. Affected versionversion=1.46.5
  49. Affected versionversion=1.46.6
  50. Affected versionversion=1.46.7
  51. Affected versionversion=1.46.8
  52. Affected versionversion=1.46.9
  53. Affected versionversion=1.47.0
  54. Affected versionversion=1.47.1
  55. Affected versionversion=1.48.0
  56. Affected versionversion=1.48.1
  57. Affected versionversion=1.48.2
  58. Affected versionversion=1.49.0
  59. Affected versionversion=1.49.1
  60. Affected versionversion=1.49.2
  61. Affected versionversion=1.49.3
  62. Affected versionversion=1.49.4
  63. Affected versionversion=1.49.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MongoDB · MongoDB Compassversion=1.36.3; version=1.36.4; version=1.37.0; version=1.38.0; version=1.38.1; version=1.38.2; version=1.39.0; version=1.39.1; version=1.39.2; version=1.39.3; version=1.39.4; version=1.40.0; version=1.40.1; version=1.40.2; version=1.40.3; version=1.40.4; version=1.41.0; version=1.42.0; version=1.42.1; version=1.42.2; version=1.42.3; version=1.42.5; version=1.43.0; version=1.43.1; version=1.43.2; version=1.43.3; version=1.43.4; version=1.43.5; version=1.43.6; version=1.44.0; version=1.44.3; version=1.44.4; version=1.44.5; version=1.44.6; version=1.44.7; version=1.45.0; version=1.45.1; version=1.45.2; version=1.45.3; version=1.45.4; version=1.46.0; version=1.46.1; version=1.46.10; version=1.46.11; version=1.46.2; version=1.46.3; version=1.46.4; version=1.46.5; version=1.46.6; version=1.46.7; version=1.46.8; version=1.46.9; version=1.47.0; version=1.47.1; version=1.48.0; version=1.48.1; version=1.48.2; version=1.49.0; version=1.49.1; version=1.49.2; version=1.49.3; version=1.49.4; version=1.49.5

Published CVSS scores

5.3NVDCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
CAPEC-77Manipulating User-Controlled Variables
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1204.002User Execution: Malicious File

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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