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CVE-2026-51302 SQLite CVE debrief

A use-after-free vulnerability exists in SQLite 3.41's expression evaluation logic. The sqlite3ReleaseTempReg function improperly releases temporary register resources, and the subsequent exprComputeOperands function continues to access the already freed register memory. By supplying a malicious SQL statement, a remote attacker can exploit this flaw to cause denial of service, leak sensitive information, or potentially execute arbitrary code on the affected system. The affected product is SQLite 3.41.

Vendor
SQLite
Product
SQLite 3.41
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-27
Original CVE updated
2026-07-31
Advisory published
2026-07-27
Advisory updated
2026-07-31

Who should care

Users of SQLite 3.41 should be aware of this vulnerability and take steps to mitigate it. This includes applying the vendor patch or upgrading to a fixed version of SQLite. Users should also restrict access to the affected system to trusted users only and monitor for suspicious activity.

Technical summary

The vulnerability is caused by the sqlite3ReleaseTempReg function improperly releasing temporary register resources, which are then accessed by the exprComputeOperands function. This can lead to denial of service, sensitive information leakage, or arbitrary code execution. The affected product is SQLite 3.41. The vulnerability has been publicly disclosed and users should take steps to mitigate it.

Defensive priority

High

Recommended defensive actions

  • Apply the vendor patch or upgrade to a fixed version of SQLite.
  • Restrict access to the affected system to trusted users only.
  • Monitor for suspicious activity and implement compensating controls.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record was published on 2026-07-27T16:17:39.273Z and has not been modified since then. The NVD entry is currently being reviewed. Users should verify the official CVE record and NVD detail page for CVE-2026-51302 for the most up-to-date information. Evidence of vulnerability exists in SQLite 3.41's expression evaluation logic, specifically in the sqlite3ReleaseTempReg function and exprComputeOperands function. The sqlite3ReleaseTempReg function improperly releases temporary register resources, and the subsequent exprComputeOperands function continues to access the already freed register memory.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-51302 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-51302

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-51302 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-51302

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.