Uncontrolled recursion in the aws-smithy-json unknown-key skip path allows unauthenticated remote denial of service in smithy-rs generated servers

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-18140 · Microsoft / collected KEV context

GHSA-8ffr-xgwf-xj56

cve-program · CVE-2026-18140

• https://crates.io/crates/aws-smithy-json/0.62.7
• https://aws.amazon.com/security/security-bulletins/2026-067-aws/
• https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-8ffr-xgwf-xj56

nvd · CVE-2026-18140

• https://aws.amazon.com/security/security-bulletins/2026-067-aws/
• https://crates.io/crates/aws-smithy-json/0.62.7
• https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-8ffr-xgwf-xj56

osv · GHSA-8ffr-xgwf-xj56

• https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-8ffr-xgwf-xj56
• https://nvd.nist.gov/vuln/detail/CVE-2026-18140
• https://github.com/smithy-lang/smithy-rs/pull/4685
• https://github.com/smithy-lang/smithy-rs/commit/8f0882046c467981ba5b4fd91a10befa96bd262f
• https://aws.amazon.com/security/security-bulletins/2026-067-aws
• https://crates.io/crates/aws-smithy-json/0.62.7
• https://github.com/smithy-lang/smithy-rs

No related operational record is retained in the current change model.