Telegram X
Telegram FZ-LLC · Build 0.28.3.1785-arm64-v8a
Review the recorded findings below. An overall grade is withheld where required checks lack coverage; a new scan may provide additional evidence.
Overview
4 finding categories to review
Telegram X (org.thunderdog.challegram) was scanned at version 0.28.3.1785-arm64-v8a on 2026-09-05 but is not graded, because the analysis did not complete enough of its checks for a score to mean anything. The checks that did run recorded 4 finding categories across 8 occurrences; because the analysis did not complete, the absence of anything more severe is not a result. 1 tracking SDK is present in the package, which describes what ships, not what runs or what it sends. This is static analysis of a single build: it does not observe the app running and does not establish that any data is exposed.
Start with these findings
mediumShort signing key (RSA 1024-bit)1 occurrence
Interpretation & review guidance
The signing key is shorter than the modern 2048-bit RSA minimum. Short keys are cryptographically weaker; a release should re-key to at least RSA-2048 (or an EC key).
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
lowFirebase Realtime Database reference2 occurrences
Interpretation & review guidance
A Firebase Realtime Database URL. Nearly every app that uses Firebase ships one. It's only an exposure if the database rules are world-readable — that's what live verification checks.
- Evidence
- 2 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
lowFirebase Storage bucket reference1 occurrence
Interpretation & review guidance
A Firebase Cloud Storage bucket reference (the default <project>.appspot.com). Storing user files here is normal — it's only an exposure if the Storage security rules allow public read/list, which live verification tests.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
Build & components
58 components recorded. Certificate parsing does not validate APK signature integrity.
Inspect build evidence →Findings
4 categories · 8 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.
mediumShort signing key (RSA 1024-bit)1 occurrence
Interpretation & review guidance
The signing key is shorter than the modern 2048-bit RSA minimum. Short keys are cryptographically weaker; a release should re-key to at least RSA-2048 (or an EC key).
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
Evidence preview
- Evidence type
- Signing metadata
- Representative location
META-INF/signing:key- Recorded match
RSA-1024
1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.
Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.
Preview evidence and Pro toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
lowFirebase Realtime Database reference2 occurrences
Interpretation & review guidance
A Firebase Realtime Database URL. Nearly every app that uses Firebase ships one. It's only an exposure if the database rules are world-readable — that's what live verification checks.
- Evidence
- 2 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
Evidence preview
- Evidence type
- Static string match
- Representative location
resources.arsc- Recorded match
Pattern recorded; identifying value redacted.
2 recorded findings have inspectable metadata. Duplicate matches may share a representative location.
Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.
Preview evidence and Pro toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
lowFirebase Storage bucket reference1 occurrence
Interpretation & review guidance
A Firebase Cloud Storage bucket reference (the default <project>.appspot.com). Storing user files here is normal — it's only an exposure if the Storage security rules allow public read/list, which live verification tests.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
Evidence preview
- Evidence type
- Static string match
- Representative location
resources.arsc- Recorded match
Pattern recorded; identifying value redacted.
1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.
Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.
Preview evidence and Pro toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
lowGoogle API key (client-shipped; restriction unverified)4 occurrences
Interpretation & review guidance
Android apps are designed to ship Google API keys in the client; Google restricts them by app signing certificate + enabled API. This is only a problem if the key is left unrestricted — presence alone is expected, not an exposure.
- Evidence
- 4 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
Evidence preview
- Evidence type
- Static string match
- Representative location
classes3.dex- Recorded match
AIza•••••••• (21–40 chars, redacted)
4 recorded findings have inspectable metadata. Duplicate matches may share a representative location.
Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.
Preview evidence and Pro toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
No categories match these filters. Clear the search or choose all severities.
Privacy signals
Capabilities and bundled software do not prove that data was collected or transmitted.
Background location Precise location Approx. location Camera Microphone Contacts Phone state Accounts Storage Draw over other apps
Requested permission inventory (58)
Data collection & flow (privacy signal, not part of the grade)
- Persistent-identifier APIs referenced in code (Android ID, Device ID / IMEI, Subscriber ID (IMSI)) with 1 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
- Camera, Contacts, Microphone, Phone, Photos & files data requested with third-party analytics/ad SDKs present.
This maps what the app can access (permissions it requests, identifier APIs its code references) to the third parties bundled in it. It reflects capability and SDK presence — not proof that a specific value was transmitted.
Trackers & SDKs (1 detected · privacy signal, not part of the grade)
Build & components
Scanned build 0.28.3.1785-arm64-v8a. Store metadata may describe a newer release.
5e70acfb0fbcd7cbf8da889bde9ec7cc6a6328f71497f90497a5ed310631d15dSigning certificate (who signed this build — factual, not part of the grade)
eb:80:1a:30:32:94:ba:02:a8:4d:03:0e:bb:12:16:c4:38:ac:98:5a:d4:b8:92:08:e3:2d:7a:71:90:dc:dd:33The certificate fingerprint identifies the parsed signing certificate. Knowing this public fingerprint does not establish ownership or validate the APK signature.
Component inventory
58 components. Advisory matching covers a curated set; no match is not proof that a component is vulnerability-free.
| Component | Version | Advisory matches |
|---|---|---|
androidx.activity:activity | 1.12.2 | None recorded |
androidx.annotation:annotation-experimental | 1.4.1 | None recorded |
androidx.appcompat:appcompat | 1.6.1 | None recorded |
androidx.appcompat:appcompat-resources | 1.6.1 | None recorded |
androidx.biometric:biometric | 1.1.0 | None recorded |
androidx.browser:browser | 1.9.0 | None recorded |
androidx.camera.featurecombinationquery:featurecombinationquery | 1.5.2 | None recorded |
androidx.camera:camera-camera2 | 1.5.2 | None recorded |
androidx.camera:camera-core | 1.5.2 | None recorded |
androidx.camera:camera-lifecycle | 1.5.2 | None recorded |
androidx.camera:camera-video | 1.5.2 | None recorded |
androidx.camera:camera-view | 1.5.2 | None recorded |
androidx.compose.runtime:runtime-annotation | 1.9.0 | None recorded |
androidx.constraintlayout:constraintlayout | 2.2.1 | None recorded |
androidx.core:core | 1.17.0 | None recorded |
androidx.core:core-ktx | 1.17.0 | None recorded |
androidx.core:core-viewtree | 1.0.0 | None recorded |
androidx.cursoradapter:cursoradapter | 1.0.0 | None recorded |
androidx.customview:customview | 1.0.0 | None recorded |
androidx.customview:customview-poolingcontainer | 1.0.0 | None recorded |
androidx.datastore:datastore | 1.1.7 | None recorded |
androidx.datastore:datastore-core | 1.1.7 | None recorded |
androidx.datastore:datastore-preferences | 1.1.7 | None recorded |
androidx.datastore:datastore-preferences-core | 1.1.7 | None recorded |
androidx.documentfile:documentfile | 1.0.0 | None recorded |
androidx.drawerlayout:drawerlayout | 1.0.0 | None recorded |
androidx.emoji2:emoji2 | 1.2.0 | None recorded |
androidx.emoji2:emoji2-views-helper | 1.2.0 | None recorded |
androidx.exifinterface:exifinterface | 1.4.2 | None recorded |
androidx.fragment:fragment | 1.3.6 | None recorded |
androidx.gridlayout:gridlayout | 1.1.0 | None recorded |
androidx.interpolator:interpolator | 1.0.0 | None recorded |
androidx.legacy:legacy-support-core-utils | 1.0.0 | None recorded |
androidx.loader:loader | 1.0.0 | None recorded |
androidx.localbroadcastmanager:localbroadcastmanager | 1.0.0 | None recorded |
androidx.navigationevent:navigationevent | 1.0.1 | None recorded |
androidx.palette:palette | 1.0.0 | None recorded |
androidx.print:print | 1.0.0 | None recorded |
androidx.profileinstaller:profileinstaller | 1.4.0 | None recorded |
androidx.recyclerview:recyclerview | 1.4.0 | None recorded |
androidx.room:room-runtime | 2.7.0 | None recorded |
androidx.savedstate:savedstate | 1.2.1 | None recorded |
androidx.security:security-crypto | 1.1.0-alpha03 | None recorded |
androidx.sqlite:sqlite | 2.5.0 | None recorded |
androidx.sqlite:sqlite-framework | 2.5.0 | None recorded |
androidx.startup:startup-runtime | 1.2.0 | None recorded |
androidx.tracing:tracing | 1.2.0 | None recorded |
androidx.tracing:tracing-ktx | 1.2.0 | None recorded |
androidx.vectordrawable:vectordrawable | 1.1.0 | None recorded |
androidx.vectordrawable:vectordrawable-animated | 1.1.0 | None recorded |
androidx.versionedparcelable:versionedparcelable | 1.1.1 | None recorded |
androidx.viewpager:viewpager | 1.1.0 | None recorded |
androidx.work:work-runtime | 2.11.0 | None recorded |
com.squareup.okhttp3:okhttp | 5.3.2 | None recorded |
kotlinx:coroutines_android | 1.10.2 | None recorded |
kotlinx:coroutines_core | 1.10.2 | None recorded |
kotlinx:coroutines_guava | 1.10.2 | None recorded |
kotlinx:coroutines_play_services | 1.10.2 | None recorded |
About this app · store information
About this app
Instant messaging — simple, fast, secure, and synced across all your devices.
Screenshots
Scan history
Each row is an observed scan. Gaps between scans do not establish how long a finding existed.
| Scanned (UTC) | Build | Score | Grade |
|---|---|---|---|
| 2026-09-05 14:42 UTC | 0.28.3.1785-arm64-v8a | 91 | A |
Export & share
Exports describe the recorded assessment. Signed evidence proves origin and integrity, not completeness or safety.
Coverage & gap matrix · Verify signed evidence
API users can request authenticated, scan-specific exports at /v1/scans/9e0926dc-da34-4d4e-a7bc-5a6a3bdc5d5d/findings.sarif (also coverage.json and proof.json).
Request a correction or removal · How to interpret a scan · Browse apps