CVE-2019-5729: Splunk-SDK-Python TLS Server Certificate Verification Vulnerability
Summary
CVE-2019-5729: Splunk-SDK-Python before 1.6.6 does not properly verify untrusted TLS server certificates, which could result in man-in-the-middle attacks. Affects splunk-sdk versions < 1.6.6. Fixed in 1.6.6. How to fix ↓
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Background
Splunk-SDK-Python is a Python library that provides a convenient interface for interacting with Splunk services. It allows developers to programmatically access and manipulate data in Splunk. The library is commonly used in various applications and integrations that require interaction with Splunk.
Vulnerability Detail
The Splunk-SDK-Python library before version 1.6.6 does not properly verify untrusted TLS server certificates. This vulnerability could potentially be exploited by an attacker to perform man-in-the-middle attacks. By presenting a malicious TLS server certificate, an attacker could intercept and modify the communication between the Splunk-SDK-Python client and the intended server, leading to potential data manipulation or leakage.
How To Fix
Latest published version: 3.0.1 as of 23 Oct 2026
pip install --upgrade "splunk-sdk==3.0.1"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.6.6
This is the first release that contains the fix.
pip install --upgrade "splunk-sdk==1.6.6"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Conclusion
The Splunk-SDK-Python library before version 1.6.6 is vulnerable to a TLS server certificate verification issue, which could lead to man-in-the-middle attacks. It is crucial to upgrade to version 1.6.6 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Splunk-SDK-Python is a Python library that provides a convenient interface for interacting with Splunk services. It allows developers to programmatically access and manipulate data in Splunk.
The vulnerability allows an attacker to perform man-in-the-middle attacks by presenting a malicious TLS server certificate. This can lead to potential data manipulation or leakage.
To fix this vulnerability, upgrade to version 1.6.6 or later of the Splunk-SDK-Python library.
No specific workarounds are mentioned for this vulnerability. It is recommended to upgrade to the fixed version of the library.
You can find more information about this vulnerability in the advisory database: https://github.com/pypa/advisory-database/blob/main/vulns/splunk-sdk/PYSEC-2019-203.yaml
