CVE-2026-59721Public exploitNetwork attack vector

Admin RCE via SMTP transport option injection

Published Jul 9, 2026 · Updated Jul 9, 2026

OS command injection in Hoppscotch before 2026.6.0 allows remote authenticated users with admin rights to execute code in the backend. The updateInfraConfigs mutation stores MAILER_SMTP_URL after validateSMTPUrl accepts query parameters that Nodemailer merges into sendmail path and argument options. An admin session, the default simple-mailer configuration, a backend restart, and one outgoing email are required; execution runs as root in the official AIO container.

CVSS severity7.2
High
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Hoppscotch before 2026.6.0 allows remote authenticated users with admin rights to execute code in the backend. The updateInfraConfigs mutation stores MAILER_SMTP_URL after validateSMTPUrl accepts query parameters that Nodemailer merges into sendmail path and argument options. An admin session, the default simple-mailer configuration, a backend restart, and one outgoing email are required; execution runs as root in the official AIO container.

The record

CVE
CVE-2026-59721
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Hoppscotch
Product
Hoppscotch
Classifications
CWE-78, CWE-915, CWE-77, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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=< 2026.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Hoppscotch · Hoppscotchversion=< 2026.6.0

Published CVSS scores

7.2GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

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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