# CVE-2026-121417: SurrealDB before 3.3.0 Use-After-Free via affinitypool spawn_local in KV Backends

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

SurrealDB before 3.3.0 contains a use-after-free vulnerability in surrealdb-core KV backends that pass borrowed transaction state into affinitypool::spawn_local closures relying on future Drop for safety. Rust embedders that leak a dispatched future (e.g. via mem::forget) and drop the transaction cause pool workers to read and write freed memory, risking crashes or memory corruption.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/surrealdb/surrealdb/commit/17584a181979f04f2aaad867332c22db1caa511a

## Affected products and versions

- surrealdb / surrealdb (surrealdb): ≥ 0; < 3.3.0 (affected, semver); 3.3.0 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.8 (high); CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: VulnCheck

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-416

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/surrealdb/surrealdb/security/advisories/GHSA-pm86-cc75-q463 (CNA: VulnCheck; vendor-advisory)

- https://github.com/surrealdb/surrealdb/commit/17584a181979f04f2aaad867332c22db1caa511a (CNA: VulnCheck; patch)

- https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-use-after-free-via-affinitypool-spawn-local-in-kv-backends (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-121417; retrieved 2026-11-03; source updated 2026-11-03

Revision: a9e8da75c88f2ddd4ed5f5d62a9edb04b3defe88e6c46ea1055958d2c1189fe9

Canonical: https://y2.dev/cve/CVE-2026-121417

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