CVE-2024-21668
Insertion of Sensitive Information into Log File in react-native-mmkv
react-native-mmkv is a library that allows easy use of MMKV inside React Native applications. Before version 2.11.0, the react-native-mmkv logged the optional encryption key for the MMKV database into the Android system log. The key can be obtained by anyone with access to the Android Debugging Bridge (ADB) if it is enabled in the phone settings. This bug is not present on iOS devices. By logging the encryption secret to the system logs, attackers can trivially recover the secret by enabling ADB and undermining an app's thread model. This issue has been patched in version 2.11.0.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Insertion of Sensitive Information into Log File in react-native-mmkv
react-native-mmkv is a library that allows easy use of MMKV inside React Native applications. Before version 2.11.0, the react-native-mmkv logged the optional encryption key for the MMKV database into the Android system log. The key can be obtained by anyone with access to the Android Debugging Bridge (ADB) if it is enabled in the phone settings. This bug is not present on iOS devices. By logging the encryption secret to the system logs, attackers can trivially recover the secret by enabling ADB and undermining an app's thread model. This issue has been patched in version 2.11.0.
- Record
CVE-2024-21668- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-532
- Updated
- 2026-11-02
EUVDEUVD-2024-0246
react-native-mmkv is a library that allows easy use of MMKV inside React Native applications. Before version 2.11.0, the react-native-mmkv logged the optional encryption key for the MMKV database into the Android system log. The key can be obtained by anyone with access to the Android Debugging Bridge (ADB) if it is enabled in the phone settings. This bug is not present on iOS devices. By logging the encryption secret to the system logs, attackers can trivially recover the secret by enabling ADB and undermining an app's thread model. This issue has been patched in version 2.11.0.
- Record
EUVD-2024-0246- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4jh3-6jhv-2mgp
react-native-mmkv Insertion of Sensitive Information into Log File vulnerability
Summary
Before version v2.11.0, the react-native-mmkv logged the optional encryption key for the MMKV database into the Android system log. The key can be obtained by anyone with access to the Android Debugging Bridge (ADB) if it is enabled in the phone settings. This bug is not present on iOS devices.
Details
The bridge for communicating between JS code and native code on Android logs the encryption key. This was fixed in commit a8995cc by only logging whether encryption is used.
Impact
The encryption of an MMKV database protects data from higher privilege processes on the phone that can access the app storage. Additionally, if data in the app's storage is encrypted, it is also encrypted in potential backups. By logging the encryption secret to the system logs, attackers can trivially recover the secret by enabling ADB and undermining an app's thread model.
The bug was discovered and fixed by somebody else. Not me. I'm just reporting this so users of react-native-mmkv upgrade the dependency.
- Record
GHSA-4jh3-6jhv-2mgp- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-532
- Updated
- 2026-11-02
NVD
react-native-mmkv is a library that allows easy use of MMKV inside React Native applications. Before version 2.11.0, the react-native-mmkv logged the optional encryption key for the MMKV database into the Android system log. The key can be obtained by anyone with access to the Android Debugging Bridge (ADB) if it is enabled in the phone settings. This bug is not present on iOS devices. By logging the encryption secret to the system logs, attackers can trivially recover the secret by enabling ADB and undermining an app's thread model. This issue has been patched in version 2.11.0.
- Record
CVE-2024-21668- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-532
- Updated
- 2026-11-02
OSV
Insertion of Sensitive Information into Log File in react-native-mmkv
react-native-mmkv is a library that allows easy use of MMKV inside React Native applications. Before version 2.11.0, the react-native-mmkv logged the optional encryption key for the MMKV database into the Android system log. The key can be obtained by anyone with access to the Android Debugging Bridge (ADB) if it is enabled in the phone settings. This bug is not present on iOS devices. By logging the encryption secret to the system logs, attackers can trivially recover the secret by enabling ADB and undermining an app's thread model. This issue has been patched in version 2.11.0.
- Record
CVE-2024-21668- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-532
- Updated
- 2026-11-02
OSVGHSA-4jh3-6jhv-2mgp
react-native-mmkv Insertion of Sensitive Information into Log File vulnerability
Summary
Before version v2.11.0, the react-native-mmkv logged the optional encryption key for the MMKV database into the Android system log. The key can be obtained by anyone with access to the Android Debugging Bridge (ADB) if it is enabled in the phone settings. This bug is not present on iOS devices.
Details
The bridge for communicating between JS code and native code on Android logs the encryption key. This was fixed in commit a8995cc by only logging whether encryption is used.
Impact
The encryption of an MMKV database protects data from higher privilege processes on the phone that can access the app storage. Additionally, if data in the app's storage is encrypted, it is also encrypted in potential backups. By logging the encryption secret to the system logs, attackers can trivially recover the secret by enabling ADB and undermining an app's thread model.
The bug was discovered and fixed by somebody else. Not me. I'm just reporting this so users of react-native-mmkv upgrade the dependency.
- Record
GHSA-4jh3-6jhv-2mgp- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-532
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
react-native-mmkvnpm |
before 2.11.0 | 2.11.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-21668 is a medium vulnerability (CVSS 4.4) in Mrousavy React-native-mmkv, published January 9, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. Fixed in react-native-mmkv 2.11.0.
References
github.com/mrousavy/react-native-mmkv/security/advisories/GHSA-4jh3-6jhv-2mgp
nvd.nist.gov/vuln/detail/CVE-2024-21668