CVE-2026-21575Network attack vector

Authenticated code execution via undisclosed mechanism

Published Jul 21, 2026 · Updated Jul 21, 2026

Remote code execution in Atlassian Sourcetree 3.4.11 through 3.4.12 allows remote authenticated users to run arbitrary code. Atlassian has not disclosed the affected component, the untrusted input, or the operation that turns that input into code execution. Exploitation requires authenticated network access and user interaction, and successful execution grants the attacker's code the client's data and process privileges.

CVSS severity7.1
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Atlassian Sourcetree 3.4.11 through 3.4.12 allows remote authenticated users to run arbitrary code. Atlassian has not disclosed the affected component, the untrusted input, or the operation that turns that input into code execution. Exploitation requires authenticated network access and user interaction, and successful execution grants the attacker's code the client's data and process privileges.

The record

CVE
CVE-2026-21575
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Atlassian
Product
Sourcetree
Classifications
CWE-94
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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=All versions from 3.4.11 to 3.4.12 inclusive

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Atlassian · Sourcetreeversion=All versions from 3.4.11 to 3.4.12 inclusive

Published CVSS scores

8.0NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.1AtlassianCVSS:3.0/AV:N/AC:H/PR:L/UI:R/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')

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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