CVE-2026-57848: Stoat for Android internal file disclosure in ShareTargetActivity

CVE-2026-57848 · Severity: medium · CVSS 5.5 · Published 2026-07-18

Stoat for Android is a messaging application. A security flaw allows other malicious apps on the same device to trick Stoat into sending its own private data—such as message history, contact lists, and login tokens—to an external recipient. This could lead to a full account takeover or the theft of private conversations without the user realizing which file is being sent.

Vendors: Stoatchat.

Quick answers

Is CVE-2026-57848 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-57848 being exploited in the wild.
How severe is CVE-2026-57848?
Medium severity, with a CVSS score of 5.5, published 18 July 2026.
Which products and versions are affected?
Stoatchat Stoat < 1.6.0.
Is there a fix for CVE-2026-57848?
A patch was published on 2026-07-18: Fixed in version 1.6.0 via commit 50d5f51 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57848 attacked?
It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-57848?
Check whether you run Stoatchat Stoat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Stoat for Android (versions prior to 1.6.0) improperly exports the 'chat.stoat.activities.ShareTargetActivity' component, making it accessible to any process on the device via the 'android.intent.action.SEND' intent. The activity fails to validate or filter incoming URIs provided in the 'android.intent.extra.STREAM' extra. A local attacker or malicious application can craft an intent with a 'file://' URI pointing to Stoat's internal storage (e.g., databases or preference files). If a user interacts with the resulting share prompt, the app will transmit the internal file to a chosen channel. This can result in the disclosure of authentication tokens, message databases, and other sensitive application data. The issue was fixed in version 1.6.0.

Affected products

  • stoatchat Stoat for Android < 1.6.0

Timeline

  • 2026-07-18: disclosed
  • 2026-07-18: advisory
  • 2026-07-18: patched: Fixed in version 1.6.0 via commit 50d5f51

References

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