The "secret chat" feature in Telegram 4.9.1 for Android has a "side channel" in which Telegram servers send GET requests for URLs typed while composing a chat message, before that chat message is sent
Published Dec 24, 2018
8.1
HIGHCVSS 3.0
EPSS 1.55%
Description
The "secret chat" feature in Telegram 4.9.1 for Android has a "side channel" in which Telegram servers send GET requests for URLs typed while composing a chat message, before that chat message is sent. There are also GET requests to other URLs on the same web server. This also affects one or more other Telegram products, such as Telegram Web-version 0.7.0. In addition, it can be interpreted as an SSRF issue. NOTE: a third party has reported that potentially unwanted behavior is caused by misconfiguration of the "Secret chats > Preview links" setting
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.55% (0.01554) | 74.23th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.55% (0.01554) | 74.03th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.86% (0.00863) | 82.51th | v3 (v2023.03.01) |
| May 16, 2024 | 0.86% (0.00863) | 82.24th | v3 (v2023.03.01) |
| Mar 30, 2024 | 0.98% (0.00981) | 83.11th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.98% (0.00981) | 81.11th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.66% (0.00663) | 18.75th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.66% (0.00663) | 0.00th | v1 |
References (2)
- https://misteralfa-hack.blogspot.com/2018/12/abusando-de-telegram-para-conseguir-una.html x_refsource_MISCExploitThird Party Advisory
- https://misteralfa-hack.blogspot.com/2018/12/telegram-siempre-in-middle.html x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://misteralfa-hack.blogspot.com/2018/12/abusando-de-telegram-para-conseguir-una.html | x_refsource_MISCExploitThird Party Advisory | |
| https://misteralfa-hack.blogspot.com/2018/12/telegram-siempre-in-middle.html | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.