SQLite up to 3.53.1 FTS5 Page Data fts5LeafSeek heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k1.95

Summaryinfo

A vulnerability was found in SQLite up to 3.53.1 and classified as critical. Impacted is the function fts5LeafSeek of the component FTS5 Page Data Handler. Such manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2026-11822. The attack must be carried out locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in SQLite up to 3.53.1 and classified as critical. Affected by this issue is the function fts5LeafSeek of the component FTS5 Page Data Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

SQLite before 3.53.2 contains memory corruption vulnerabilities in the FTS5 full-text search extension that allow attackers to cause process crashes, memory exhaustion, or arbitrary code execution by supplying a crafted database with malformed FTS5 page data. Attackers can trigger an out-of-bounds read in fts5LeafSeek() via an attacker-controlled loop bound and a heap buffer overflow write in fts5ChunkIterate() through a crafted continuation page causing an integer underflow, exploitable when an FTS5 MATCH query is executed against the malicious database.

The weakness was presented by Ashish Kunwar. The advisory is shared for download at sqlite.org. This vulnerability is handled as CVE-2026-11822 since 06/09/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 3.53.2 eliminates this vulnerability.

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Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SQLite 3.53.2

Timelineinfo

06/09/2026 Advisory disclosed
06/09/2026 +0 days CVE reserved
06/09/2026 +0 days VulDB entry created
06/09/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: sqlite.org
Researcher: Ashish Kunwar
Status: Confirmed

CVE: CVE-2026-11822 (🔒)
GCVE (CVE): GCVE-0-2026-11822
GCVE (VulDB): GCVE-100-369968

Entryinfo

Created: 06/09/2026 21:46
Changes: 06/09/2026 21:46 (77)
Complete: 🔍
Cache ID: 216::103

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