Bug 2543754 (CVE-2026-51936)

Summary: CVE-2026-51936 sqlcipher: sqlcipher: Defensive mode bypass via crafted source database parameter
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in SQLCipher. An attacker with local access can bypass defensive security restrictions and cause database corruption by supplying a crafted source database name to the sqlcipher_export function. Because defensive restrictions are temporarily relaxed during export operations, improper parameter validation permits the execution of unauthorized SQL statements that can directly alter internal database schema tables.
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Bug Depends On: 2543788, 2543789    
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Description OSIDB Bzimport 2026-09-30 00:41:19 UTC 
Zetetic SQLCipher before 4.15.0 allows SQL injection. The sqlcipher_export convenience function can be used to copy the contents of one attached database into another. It is most often used to convert between plaintext and encrypted databases. It needs to do dynamic schema manipulation, and thus the function temporarily clears defensive restrictions during operation. A vulnerability in the handling of the source database name parameter made it possible for a caller to supply a crafted source name, which could execute statements that defensive mode would otherwise block. This could allow direct modifications to the sqlite_schema table and database corruption. SQLCipher 4.15.0 now strictly validates the source database name and prevents the bypass.