I literally just: ✅ Sent a voice note instead of a text. ✅ Typed "You too" when they said "Have a good day." ✅ Spent 20 minutes analyzing if the period at the end of their sentence means they hate me.

Open Telegram Web or the desktop app on your computer. Often, the desktop version can handle the corrupted message, allowing you to delete it, which will then resolve the issue on your phone.

| Bug Category | Description & Impact | | :--- | :--- | | | A known issue caused client crashes when users joined groups where "Send messages" and "Send media" permissions were disabled, forcing the app to close immediately on Windows or macOS. | | Text & Input Parsing | Several parsing errors have led to crashes. For instance, editing a message with Cyrillic characters caused the macOS client to crash with an exception, and sending an oversized message payload could trigger a denial-of-service. | | Media Processing | Similar to the major sticker bug, other media-processing flaws could cause severe crashes. One issue involved a channel scroll causing a “bad memory access” crash, often resolved by clearing the app's cache. | | Right-Click Context Menus | A common source of instability came from the right-click context menu. Reports detailed that right-clicking on certain messages in a group would consistently crash the Telegram Desktop client. | | Account Switching & General Use | Unexpected behavior has also been a cause. Swinging between multiple accounts on Telegram Desktop sometimes caused a crash. A notable update (Version 6.6) caused the app to close every time a user opened any chat, forcing users to revert to an older version. |

If you’ve been hit by a crush bug, follow the recovery steps above, and you’ll likely be back to normal within minutes. For the latest crush bug signatures and patch notes, follow Telegram’s official news channel (@telegram) and reputable cybersecurity researchers on Twitter/X.

Telegram is not alone in facing this issue; nearly every major messaging platform has suffered from similar exploits:

The phenomenon reveals an important truth: even the most beloved apps have exploitable edges. While Telegram remains far more secure and feature-rich than many competitors, users must remain vigilant. A crush bug is not the end of the world—it’s a temporary annoyance with clear fixes.

Go to and set all options to Never . This prevents corrupt thumbnails from being processed before you see them.

Telegram regularly releases patches to fix these vulnerabilities. However, new variations of crash codes emerge frequently. Protect yourself proactively with these settings:

: Experts from Trend Micro’s Zero Day Initiative (ZDI) and CSIRT Italy have issued official alerts, confirming the vulnerability's existence and warning of its critical nature.

Telegram crashes when typing a capital letter O into any chat. #4259

Log into (web.telegram.org) or download Telegram Desktop on a PC or Mac. Locate the chat containing the malicious text or media.

The severity of a Telegram crush bug can range from a minor annoyance to a severe disruption of your digital life.

The "Crush Bug" in Telegram refers to a now-fixed vulnerability in the popular messaging app that could have allowed attackers to crash a user's device or even take control of it.