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CVE-2026-18140Disclosure(amazon / aws-smithy-json)

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

Uncontrolled recursion in the unknown-key skip path of the aws-smithy-json runtime crate before 0.62.7, which the smithy-rs code generator invokes from every generated struct deserializer, might allow remote unauthenticated users to cause a denial of service (process abort via stack exhaustion) via a single small HTTP request containing deeply nested JSON to a smithy-rs generated server. To remediate this issue, users should upgrade to aws-smithy-json 0.62.7 or later and rebuild.

amazon CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-674

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • aws-smithy-json

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

Affected systems

Vendors
amazon
Products
aws-smithy-json

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-07-30: 2Technical Details · 2026-07-30: 207-30
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-18140 Uncontrolled recursion in the unknown-key skip path of the aws-smithy-json runtime crate before 0.62.7, which the smithy-rs code generator invokes from every generate… https://www.cve.org/CVERecord?id=CVE-2026-18140 ----- Traducción: CVE-2026-18140 Rec… http://infoflow.cloud`

    Post summary

    The post announces CVE‑2026‑18140, briefly describing an uncontrolled recursion flaw in aws‑smithy‑json before 0.62.7 and linking to the CVE record, with no evidence of abuse, PoC, or remediation.

    0000040
    96 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-18140 Uncontrolled recursion in the unknown-key skip path of the aws-smithy-json runtime crate before 0.62.7, which the smithy-rs code generator invokes from every generate… https://www.cve.org/CVERecord?id=CVE-2026-18140

    Post summary

    The text references CVE-2026-18140, describing an uncontrolled recursion issue in aws‑smithy‑json before 0.62.7, but provides no exploitation details or mitigation steps.

    00000841
    57.9K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appamazonaws-smithy-json-rust-

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