CVE-2026-11822

Code execution via FTS5 heap buffer overflow

Published Jun 9, 2026 · Updated Jun 9, 2026

Heap buffer overflow in SQLite before 3.53.2 allows attackers to execute code by running FTS5 MATCH against malformed page data. In fts5ChunkIterate(), a crafted continuation page drives szLeaf below four, underflowing the remaining-byte count and writing attacker-controlled data beyond a heap allocation. Reachability requires FTS5 enabled, SQLITE_DBCONFIG_DEFENSIVE disabled, and control of arbitrary SQL or a database that an application opens and queries.

CVSS severity8.5
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in SQLite before 3.53.2 allows attackers to execute code by running FTS5 MATCH against malformed page data. In fts5ChunkIterate(), a crafted continuation page drives szLeaf below four, underflowing the remaining-byte count and writing attacker-controlled data beyond a heap allocation. Reachability requires FTS5 enabled, SQLITE_DBCONFIG_DEFENSIVE disabled, and control of arbitrary SQL or a database that an application opens and queries.

The record

CVE
CVE-2026-11822
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
SQLite
Product
SQLite
Classifications
CWE-122, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.53.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

SQLite · SQLiteversion=0 <3.53.2

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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