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TI-2026-14928 Aliases CVE-2026-18140GHSA-8ffr-xgwf-xj56

Uncontrolled recursion in aws-smithy-json

Priority MEDIUM 45CWE-674Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 7 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-674.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00784 56th percentileScored 2026-11-07
Fix Partial aws-smithy-json (crates.io): 0.62.7Red Hat: 7 advisoriesRed Hat: 7 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AWSaws-smithy-json0.32.0 – 0.62.6—No fix listedCNA
—aws-smithy-json (crates.io)before 0.62.70.62.7Patch availableGHSA-8ffr-xgwf-xj56
  • aws-smithy-json VendorAWS Affected 0.32.0 – 0.62.6 Fixed in — No fix listed CNA
  • aws-smithy-json (crates.io) Vendor— Affected before 0.62.7 Fixed in 0.62.7 Patch available GHSA-8ffr-xgwf-xj56

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:amazon:aws-smithy-json:*:*:*:*:*:rust:*:*before 0.62.7VulnerableAWS
  • cpe:2.3:a:amazon:aws-smithy-json:*:*:*:*:*:rust:*:* Versions before 0.62.7 Vulnerable ·AWS

Remediation

  • Fix · GHSA-8ffr-xgwf-xj56 aws-smithy-json (crates.io) Fixed in 0.62.7 Advisory →

Red Hat 7 advisories

  • RHSA-2026:83603 Released 2026-10-15 · Red Hat rating Important
    RHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
    • Red Hat Trusted Artifact Signer 1.4 registry.redhat.io/rhtas/tuffer-rhel9, registry.redhat.io/rhtas/tuftool-rhel9
  • RHSA-2026:83013 Released 2026-10-14 · Red Hat rating Important
    Logging for Red Hat OpenShift - 6.0.17
    • Logging Subsystem for Red Hat OpenShift 6.0 registry.redhat.io/openshift-logging/cluster-logging-rhel9-operator, registry.redhat.io/openshift-logging/eventrouter-rhel9, registry.redhat.io/openshift-logging/logging-loki-rhel9 +3
  • RHSA-2026:70870 Released 2026-09-23 · Red Hat rating Important
    Logging for Red Hat OpenShift - 6.5.3
    • Logging Subsystem for Red Hat OpenShift 6.5 registry.redhat.io/openshift-logging/cluster-logging-rhel9-operator, registry.redhat.io/openshift-logging/eventrouter-rhel9, registry.redhat.io/openshift-logging/logging-loki-rhel9 +3
Show 4 more Red Hat advisories
  • RHSA-2026:68349 Released 2026-09-16 · Red Hat rating Important
    Logging for Red Hat OpenShift - 6.2.13
    • Logging Subsystem for Red Hat OpenShift 6.2 registry.redhat.io/openshift-logging/cluster-logging-rhel9-operator, registry.redhat.io/openshift-logging/eventrouter-rhel9, registry.redhat.io/openshift-logging/loki-rhel9-operator +2
  • RHSA-2026:67595 Released 2026-09-15 · Red Hat rating Important
    goose bug fix and enhancement update
    • Red Hat Enterprise Linux Extensions Channel (v. 9) goose-1.38.0-1.el9_8
  • RHSA-2026:67593 Released 2026-09-15 · Red Hat rating Important
    goose bug fix and enhancement update
    • Red Hat Enterprise Linux Extensions Channel (v. 10) goose-1.38.0-1.el10_2
  • RHSA-2026:66521 Released 2026-09-10 · Red Hat rating Important
    Logging for Red Hat OpenShift - 6.6.1
    • Logging Subsystem for Red Hat OpenShift 6.6 registry.redhat.io/openshift-logging/cluster-logging-rhel9-operator, registry.redhat.io/openshift-logging/eventrouter-rhel9, registry.redhat.io/openshift-logging/lokistack-gateway-rhel9 +1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Trusted Profile AnalyzerAffectedNo fix planned: Will not fix
Logging Subsystem for Red Hat OpenShift 6.0Fixed RHSA-2026:83013
Logging Subsystem for Red Hat OpenShift 6.2Fixed RHSA-2026:68349
Logging Subsystem for Red Hat OpenShift 6.5Fixed RHSA-2026:70870
Logging Subsystem for Red Hat OpenShift 6.6Fixed RHSA-2026:66521
Red Hat Enterprise Linux Extensions Channel (v. 10)Fixed RHSA-2026:67593
Red Hat Enterprise Linux Extensions Channel (v. 9)Fixed RHSA-2026:67595
Red Hat Trusted Artifact Signer 1.4Fixed RHSA-2026:83603
Not affected: 6 products
  • Confidential Compute Attestation
  • Logging Subsystem for Red Hat OpenShift 6.0
  • Logging Subsystem for Red Hat OpenShift 6.2
  • Logging Subsystem for Red Hat OpenShift 6.5
  • Logging Subsystem for Red Hat OpenShift 6.6
  • Red Hat Trusted Profile Analyzer

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-18140
  2. 2026-10-03 Alias added: GHSA-8ffr-xgwf-xj56
  3. 2026-10-15 Fix available: RHSA-2026:83013 · Red Hat
  4. 2026-10-16 Fix available: RHSA-2026:83603 · Red Hat
  5. 2026-10-16 Fix available: Logging Subsystem for Red Hat OpenShift 6.0, Red Hat Trusted Artifact Signer 1.4 · Red Hat
  6. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 3

Other 4

Sources

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