Heap-data disclosure via oversized ZIP length
Published Mar 12, 2026 · Updated Mar 12, 2026
Information disclosure in SQLite's zipfile extension 3.51.1 and earlier allows attackers to read heap data from a crafted ZIP file. zipfileInflate allocates a buffer from the ZIP directory's claimed uncompressed size, then returns that full size instead of the bytes actually inflated, exposing an uninitialized tail. Reachability requires the zipfile extension and attacker-controlled ZIP input; the extension is usually present in the CLI but not the standard library.
Summary
What happened
Information disclosure in SQLite's zipfile extension 3.51.1 and earlier allows attackers to read heap data from a crafted ZIP file. zipfileInflate allocates a buffer from the ZIP directory's claimed uncompressed size, then returns that full size instead of the bytes actually inflated, exposing an uninitialized tail. Reachability requires the zipfile extension and attacker-controlled ZIP input; the extension is usually present in the CLI but not the standard library.
The record
- CVE
- CVE-2025-70873
- Published
- Mar 12, 2026
- Updated
- Mar 12, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-244
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 12, 2026CVE publishedPublication date reported by the CVE source.
- Mar 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- SQLite zipfile uninitialized-heap disclosure proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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