SQLite Session Extension CVE-2026-50812
MEDIUMSeverity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Local vector and low privileges required to supply changeset input; crash-only impact means C:N/I:N/A:H with no scope change.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionCVE.org
A NULL pointer dereference in the SQLite Session Extension in SQLite 3.53.1 and SQLite trunk builds before check-in e807d4e3798efd53 allows an attacker who can supply a malformed changeset blob to cause a denial of service. The issue occurs when sqlite3changeset_apply_v3() applies a corrupt changeset and reaches sqlite3_value_type() with a NULL sqlite3_value pointer.
AnalysisAI
NULL pointer dereference in SQLite's Session Extension crashes any application that passes attacker-controlled changeset blobs to sqlite3changeset_apply_v3(). Affected releases include SQLite 3.53.1 and all trunk builds prior to check-in e807d4e3798efd53. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three specific conditions: (1) the target SQLite build must have been compiled with SQLITE_ENABLE_SESSION - this is not the default for many embedded distributions; (2) the target application must invoke sqlite3changeset_apply_v3() on its data path; and (3) the attacker must have low-privilege local access sufficient to supply a malformed changeset blob to that application, either as a file, IPC argument, or API input. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, score 5.5) accurately characterizes a local, low-privilege denial-of-service. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-privilege local access crafts a binary changeset blob containing corrupt data - sufficient to cause the SQLite iterator to produce a NULL sqlite3_value pointer - and supplies it to a target application that calls sqlite3changeset_apply_v3(), causing an immediate NULL pointer dereference and process crash. A public PoC gist is referenced at https://gist.github.com/junius-sec/bb556f333957c5226dede314db0e9e91, suggesting the crash is reproducible with a crafted input. … |
| Remediation | Upstream fix available via commit e807d4e3798efd53 (https://sqlite.org/src/info/e807d4e3798efd53) and GitHub mirror commit b869ed6b067d623cb1383549f2a18aa35508385d; a tagged stable release incorporating this fix has not been independently confirmed at time of analysis - patch status is 'upstream fix available (commit), released patched version not independently confirmed.' Applications that bundle the SQLite amalgamation should re-vendor the amalgamation from trunk at or after the fix commit. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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