Executive Summary

CVE-2026-4242 is a security flaw in the BabyChakra Pregnancy & Parenting App up to version 5.4.3.0 on Android. The vulnerability exists in the file app/babychakra/babychakra/Configuration.java, specifically involving manipulation of the argument SEGMENT_WRITE_KEY.

This manipulation leads to unprotected storage of credentials, classified under CWE-256, meaning sensitive credentials are stored in plaintext. This can compromise confidentiality if exploited.

The attack requires local access to the device and is considered difficult to exploit, but a proof-of-concept exploit is publicly available.

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Impact Analysis

The vulnerability can lead to the compromise of sensitive credentials due to their storage in plaintext, risking confidentiality.

An attacker with local access can extract the hardcoded Segment write key and misuse it to send arbitrary tracking events and modify user profiles through Segment’s API.

This misuse can result in injection of fraudulent analytics data, corrupting business intelligence, causing incorrect user segmentation, and leading to misuse of downstream systems that rely on this data.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability involves the unprotected storage of credentials in the BabyChakra Pregnancy & Parenting App's Configuration.java file, specifically the SEGMENT_WRITE_KEY argument. Detection requires local access to the device or application files."}, {'type': 'paragraph', 'content': "To detect this vulnerability, you can analyze the app's APK by reverse engineering or decompiling it to inspect the Configuration.java file or its compiled equivalent for the presence of the hardcoded SEGMENT_WRITE_KEY."}, {'type': 'paragraph', 'content': 'Suggested commands include using tools like apktool or JADX to decompile the APK and grep to search for the SEGMENT_WRITE_KEY string.'}, {'type': 'list_item', 'content': 'apktool d BabyChakra.apk -o BabyChakra_decompiled'}, {'type': 'list_item', 'content': 'grep -r SEGMENT_WRITE_KEY BabyChakra_decompiled/'}, {'type': 'paragraph', 'content': 'Alternatively, you can use JADX GUI to browse the decompiled source code and locate the vulnerable Configuration.java file.'}] [1, 2]

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Mitigation Strategies

There are no known vendor-provided mitigations or patches for this vulnerability as the vendor did not respond to the disclosure.

Immediate mitigation steps include removing or replacing the affected component or product to avoid the risk of credential exposure.

Additionally, restrict local access to devices running the vulnerable app to prevent attackers from exploiting the vulnerability.

Monitor for any suspicious activity related to the misuse of the exposed Segment write key, such as fraudulent analytics data or unauthorized tracking events.

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