CVE-2026-28576 One Picked Contact, Every Contact—SQL Injecti...

[carlospolop]

🤖 Automated Content Update

This PR was automatically generated by the HackTricks News Bot based on a technical blog post.

📝 Source Information

• Blog URL: https://github.com/mobilehackinglab/CVE-2026-28576-poc
• Blog Title: CVE-2026-28576: One Picked Contact, Every Contact—SQL Injection in the Android Contacts Provider
• Suggested Section: Mobile Pentesting > Android Applications Pentesting > content:// protocol, with a cross-reference from Drozer Tutorial > Exploiting Content Providers

🎯 Content Summary

Overview, severity, and impact

CVE-2026-28576, also tracked as GHSA-ph86-9mcx-3p6r, is a high-severity SQL injection and information-disclosure vulnerability in Android 17's Contacts Provider, specifically ContactsProvider2.queryLocal(). A zero-permission application can use the legitimate Android system contact picker to obtain a read-only URI grant for exactly one contact and then exploit S...

🔧 Technical Details

Scoped URI grant used as an SQL-injection carrier: When a content provider correctly restricts a caller to a narrow, read-only URI but forwards caller-controlled selection text into an SQL query, the URI-level permission boundary can remain intact while the SQL expression accesses data outside the granted row. An attacker needs only a legitimate scoped URI grant; direct access to other URIs can still fail with SecurityException.

Target-SDK compat-gate bypass: Security validation that is enabled only for applications targeting a newer SDK leaves legacy-target applications on an older parsing path. In this case, a caller targeting SDK 36 or lower makes CompatChanges.isChangeEnabled(ENFORCE_STRICT_SQL_CHECKS, callingUid) return false, preventing setStrictColumns() and setStrictGrammar() from running. Parenthesis wrapping from setStrict(true) defeats simple payloads such...

🤖 Agent Actions

Implemented the HackTricks update.

Changes

• Added scoped URI-grant SQL injection and Boolean-oracle extraction to:
  • src/mobile-pentesting/android-app-pentesting/content-protocol.md
• Documented:
  • URI authorization versus SQL authorization boundaries
  • Legacy targetSdkVersion compat-gate bypass
  • Balanced scalar-subquery probe
  • Cursor-row-count oracle
  • Strict grammar validation and compat testing
• Added the requested cross-reference from:
  • drozer-tutorial/exploiting-content-providers.md
• Added numbered citations to the Android bulletin, fix commit, Android API documentation, and PoC repository.

Validation

• git diff --check passed.
• Internal cross-reference path and anchor validated.
• Citation numbering and referenced URLs validated.
• No forbidden sources added.
• mdbook was unavailable in the environment, so a full build could not be run.

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This PR was automatically created by the HackTricks Feed Bot. Please review the changes carefully before merging.

[carlospolop]

🔗 Additional Context

Original Blog Post: https://github.com/mobilehackinglab/CVE-2026-28576-poc

Content Categories: Based on the analysis, this content was categorized under "Mobile Pentesting > Android Applications Pentesting > content:// protocol, with a cross-reference from Drozer Tutorial > Exploiting Content Providers".

Repository Maintenance:

• MD Files Formatting: 1032 files processed

Review Notes:

• This content was automatically processed and may require human review for accuracy
• Check that the placement within the repository structure is appropriate
• Verify that all technical details are correct and up-to-date
• All .md files have been checked for proper formatting (headers, includes, etc.)

Bot Version: HackTricks News Bot v1.0