Are JitPack Dependencies Safe for Production Android Apps? The Critical Security Risks Developers Ignore

Feb 22, 2026

Cowrie

Dev @ Bswen

The Discovery

Last week, I was auditing dependencies for a production Android app when I found something that made my stomach drop.

build.gradle

dependencies {
    implementation 'com.github.abandoned-user:critical-lib:1.+'
    implementation 'com.github.another-deleted-account:ui-components:1.0.0-SNAPSHOT'
}

The GitHub accounts for these libraries had been deleted months ago. But the dependencies still built successfully. That’s when I discovered the critical security vulnerability in how JitPack handles version resolution.

The Problem

When I dug deeper, I found that JitPack allows mutable version specifiers that create supply chain attack vectors. Here’s what happens:

┌─────────────────────────────────────────────────────────────┐
│                    ATTACK SCENARIO                           │
├─────────────────────────────────────────────────────────────┤
│                                                             │
│  1. Developer uses: 'com.github.user:lib:1.+'              │
│     (Pulls latest 1.x version automatically)               │
│                                                             │
│  2. Original author deletes GitHub account                  │
│     (Namespace becomes available for registration)         │
│                                                             │
│  3. Attacker registers same username                        │
│     (Gains control of the namespace)                       │
│                                                             │
│  4. Attacker publishes version 1.5.0 with malware           │
│     (Your app auto-updates on next build)                  │
│                                                             │
│  5. Production app now contains malicious code              │
│     (Supply chain attack complete)                         │
│                                                             │
└─────────────────────────────────────────────────────────────┘

The core issue is that mutable version specifiers like 1.+ or -SNAPSHOT create implicit trust. Your build system pulls whatever code happens to be published under that version pattern, even if the publisher has changed.

Why This Happens

I think the key reason this problem exists is that JitPack was designed for convenience, not security. It bridges GitHub repositories and Maven artifacts without enforcing the security controls that traditional repositories like Maven Central require.

When I checked the build.gradle files across multiple Android projects, I found the same pattern repeatedly:

Version Type	Example	Risk Level	Why It’s Dangerous
Mutable range	1.+	CRITICAL	Auto-pulls any new version
Snapshot	1.0.0-SNAPSHOT	HIGH	Changes without warning
Pinned version	1.0.0	MEDIUM	Safe unless namespace hijacked
Commit hash	abc123def456	LOW	Immutable, specific

The problem compounds because:

1. Android apps use many dependencies - Each one is a potential attack vector
2. Transitive dependencies - Your direct dependencies depend on other libraries you never audit
3. CI/CD automation - Build systems pull updates without human review
4. Play Store distribution - Compromised builds reach millions before detection

Real-World Impact

I found the AppIntro library case particularly instructive. Security researchers discovered that the original namespace was abandoned and could have been hijacked. They took over the library defensively, but it demonstrates how easily production apps can be compromised.

When I scanned my own dependencies, I realized:

Direct Dependencies: 15 libraries
  ↓
Transitive Dependencies: 47 libraries
  ↓
Potential Attack Vectors: 62 different supply chain paths

Most Android developers I talked to never audit transitive dependencies. They assume if a direct dependency is safe, everything it pulls in is safe too. That assumption is dangerous.

How to Fix It

Immediate Actions

I started by checking all my build.gradle files for mutable versions:

Terminal

# Find dangerous version patterns
grep -r ":\+" --include="*.gradle" .
grep -r "SNAPSHOT" --include="*.gradle" .

Then I replaced every mutable version with a specific pinned version:

build.gradle

dependencies {
    // DANGEROUS - Auto-updates
    implementation 'com.github.user:lib:1.+'

    // DANGEROUS - Mutable snapshot
    implementation 'com.github.user:lib:1.0.0-SNAPSHOT'

    // RISKY - Abandoned account
    implementation 'com.github.deleted-account:lib:1.0.0'
}

build.gradle

dependencies {
    // SAFE - Pinned version
    implementation 'com.github.user:lib:1.0.0'

    // SAFEST - Commit hash
    implementation 'com.github.user:lib:abc123def456'

    // Replace with maintained alternative
    implementation 'com.github.maintained:lib:2.0.0'
}

Long-Term Strategy

I implemented a dependency review process:

┌─────────────────────────────────────────────────────────┐
│          DEPENDENCY REVIEW PROCESS                      │
├─────────────────────────────────────────────────────────┤
│                                                         │
│  Before adding any new dependency:                      │
│                                                         │
│  1. Check account status                                │
│     └─ Is GitHub account active?                        │
│     └─ Last commit within 6 months?                    │
│                                                         │
│  2. Review maintainer history                           │
│     └─ Account age > 1 year?                           │
│     └─ Consistent commits?                             │
│     └─ Responsive to issues?                           │
│                                                         │
│  3. Pin to specific version                            │
│     └─ Use commit hash if available                    │
│     └─ Never use mutable ranges                        │
│                                                         │
│  4. Document decision                                   │
│     └─ Why this dependency?                           │
│     └─ What's the update plan?                        │
│                                                         │
│  5. Set up monitoring                                  │
│     └─ Dependabot/Renovate for security updates        │
│     └─ Manual review required for all updates         │
│                                                         │
└─────────────────────────────────────────────────────────┘

I also created a gradle.properties policy:

gradle.properties

# Dependency Security Policies
dependency.version.pin.enforced=true
dependency.mutable.rejected=true
dependency.snapshot.allowed=false

Verification Commands

I run these commands weekly to catch any new mutable dependencies that slipped through:

Terminal

# Check for any mutable versions
./gradlew dependencies | grep -E "SNAPSHOT|\+"

# List all direct dependencies
./gradlew dependencies --configuration implementation | grep "\---"

# Check dependency tree for vulnerabilities
./gradlew dependencyCheckAnalyzer

The Root Cause

I think the fundamental issue is that we treat dependencies like utilities. We assume libraries are infrastructure that just works, like electricity or water. But dependencies are actually code written by people who can lose interest, get hacked, or abandon projects.

The JitPack convenience model amplifies this risk:

Traditional Maven Central:
├─ Maintainer must apply for publication rights
├─ Artifacts are immutable once published
├─ Requires GPG signatures
└─ Manual review process

JitPack:
├─ Anyone with GitHub can publish
├─ Artifacts can be overwritten (snapshots)
├─ No signature requirement
└─ Automated from any public repo

Both models have their place. JitPack is excellent for rapid prototyping and personal projects. But for production Android apps, the convenience tradeoff is too risky.

Comparison: Safe vs Unsafe Patterns

Here’s what I learned about safe dependency management:

Unsafe Patterns

❌ implementation 'com.github.user:lib:1.+'
   Pulls any 1.x version - vulnerable to hijacking

❌ implementation 'com.github.user:lib:1.0.0-SNAPSHOT'
   Can change without warning - no guarantee of stability

❌ implementation 'com.github.INACTIVE_USER:lib:1.0.0'
   Even pinned versions are risky if account is abandoned

Safe Patterns

✓ implementation 'com.github.ACTIVE_USER:lib:1.0.0'
   Pinned version + active maintainer = safer

✓ implementation 'com.github.user:lib:abc123def456'
   Commit hash - immutable reference

✓ implementation 'com.maven-central:lib:1.0.0'
   From Maven Central with GPG signature verification

The Monitoring Solution

I set up automated monitoring to catch potential compromises:

Weekly Automated Checks:
├─ Scan for mutable versions
├─ Verify all dependency accounts are active
├─ Check for abandoned repos (no commits in 6 months)
├─ Run security scanner (OWASP Dependency Check)
├─ Alert team if any issues found

The key insight is that dependency security isn’t a one-time setup. It’s an ongoing process. Libraries get abandoned, maintainers move on, and security vulnerabilities are discovered. You need continuous monitoring.

Community Insights

When I discussed this with other Android developers, I found that most had never considered namespace hijacking as an attack vector. Common responses:

• “I just Dependabot to update everything”
• “If it’s on JitPack, it must be safe”
• “I only audit direct dependencies”
• “Supply chain attacks won’t happen to me”

But the security researchers who discovered the AppIntro vulnerability had a different view: “JitPack is a ticking time-bomb for production apps that use mutable versions.”

I agree. The risk isn’t theoretical. It’s structural to how JitPack works.

Summary

In this post, I showed how JitPack dependencies with mutable versions create supply chain attack vectors in Android apps. The key point is that when you use version specifiers like 1.+ or -SNAPSHOT, you’re giving anyone who controls that namespace the ability to inject code into your production app.

The solution is simple but requires discipline:

1. Never use mutable versions in production builds
2. Pin to specific versions or commit hashes
3. Audit all dependencies including transitive ones
4. Monitor for abandoned maintainers and namespace changes
5. Have a rollback plan for compromised dependencies

Security isn’t about eliminating risk. That’s impossible. Security is about making informed tradeoffs. JitPack’s convenience is great for prototyping, but for production Android apps, the supply chain risks outweigh the benefits.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

• 👨‍💻 JitPack Documentation
• 👨‍💻 Android Security Best Practices
• 👨‍💻 OWASP Dependency Check
• 👨‍💻 Supply Chain Security in Mobile Apps

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!

Comments

Tags:

• mobile
• security
• career

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