CVE-2026-15957Disclosure

LOWCVSS 8.7 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Smithy-RS is a Rust code generation and runtime framework that generates HTTP clients and servers from Smithy interface definitions, powering the AWS SDK for Rust and custom service implementations. Uncontrolled recursion in the JSON, CBOR, and XML deserializer functions emitted by Amazon smithy-rs code generation could allow remote attackers to cause a denial of service (process abort via stack exhaustion) via a small request containing deeply nested data for a recursive model shape to a generated SDK or server. To mitigate this issue, users should upgrade to aws-sdk-rust release-2026-06-02 or later. Users building custom servers with smithy-rs codegen should regenerate from smithy-rs release-2026-06-01 or later.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-674

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Eyal Estrin ☁️@eyalestrin91d
Disclosure
CVE-2026-15957 - Uncontrolled recursion in smithy-rs generated JSON, CBOR, and XML deserializers allows unauthenticated remote denial of service via recursive shapes http://dlvr.it/TTfdQJ #patchmanagement
Post summary
The tweet announces CVE-2026-15957, describing an uncontrolled recursion flaw in smithy‑rs deserializers that permits unauthenticated remote denial of service via recursive shapes. No PoC, exploit, or patch is mentioned.
0000053
2.0K followersView on X
豊月@yutuki_r91d
Disclosure
CVE-2026-15957 - Uncontrolled recursion in smithy-rs generated JSON, CBOR, and XML deserializers allows unauthenticated remote denial of service via recursive shapes https://aws.amazon.com/security/security-bulletins/rss/2026-061-aws/ #amazon #feedly
Post summary
The tweet announces a denial‑of‑service vulnerability (CVE‑2026‑15957) in AWS smithy‑rs deserializers, providing a brief technical description but no PoC, exploit code, or patch details.
0000072
1.0K followersView on X

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