stoatchat Stoat up to 1.5.x ShareTargetActivity STREAM information disclosure

Summaryinfo

A vulnerability identified as problematic has been detected in stoatchat Stoat up to 1.5.x. Affected by this issue is some unknown functionality of the component ShareTargetActivity. This manipulation of the argument STREAM causes information disclosure. This vulnerability is registered as CVE-2026-57848. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in stoatchat Stoat up to 1.5.x. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component ShareTargetActivity. The manipulation of the argument STREAM with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Stoat for Android exports the chat.stoat.activities.ShareTargetActivity component (reachable to any process on the device via the android.intent.action.SEND intent) and accepts the file to share as a URI supplied through the android.intent.extra.STREAM extra. The activity does not validate or filter the incoming URI before using it as the outgoing attachment, so a caller can pass a file:// URI pointing at the application's own internal storage (for example /data/data/chat.revolt/databases/revolt.db, cached authentication token files, or preferences) and have the app treat that internal file as a user-selected attachment. An attacker who can invoke intents on the victim's device (via ADB access, a co-installed malicious application, or any other route that reaches Android's intent dispatch) can launch ShareTargetActivity with such a URI and cause the victim, on a single channel-selection interaction, to send the internal file to any Stoat channel or user of the attacker's choosing. The composer displays the attachment as \"attachment\" with no filename indication, so the victim has no visible signal that the file being sent is their own internal application data. Consequences include disclosure of the local Stoat database (message history, contact list, cached content), disclosure of authentication tokens permitting full account takeover, and disclosure of any other file readable by the app process.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-57848 since 06/25/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 1.6.0 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Chat Software

Vendor

• stoatchat

Name

• Stoat

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion