Vulnerability-Lookup

CVE-2026-15738 (GCVE-0-2026-15738)

Vulnerability from cvelistv5 – Published: 2026-07-14 20:19 – Updated: 2026-07-15 13:01

Title

Cross-namespace traffic interception via incorrect route precedence ordering in AWS Load Balancer Controller

Summary

Incorrect behavior order in the Gateway API listener-rule generation in Amazon AWS Load Balancer Controller before 3.4.2 might allow an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource. To mitigate this issue, users should upgrade to version 3.4.2.

Severity

5.8 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

8.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-15 13:00 UTC

CWE

CWE-653 - Improper isolation or compartmentalization

Assigner

AMZN mitre root

References

2 references

URL	Tags
https://github.com/kubernetes-sigs/aws-load-balan…	release-notes
https://aws.amazon.com/security/security-bulletin…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Amazon	aws-load-balancer-controller	Affected: 0 , < 3.4.2 (custom) cpe:2.3:a:amazon:aws-load-balancer-controller::::::::

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-15738

Vulnerability from fkie_nvd - Published: 2026-07-14 21:16 - Updated: 2026-07-15 16:17

Severity

8.5 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	ff89ba41-3aa1-4d27-914a-91399e9639e5	https://aws.amazon.com/security/security-bulletins/2026-055-aws/
	ff89ba41-3aa1-4d27-914a-91399e9639e5	https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases/tag/v3.4.2

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "lastModified": "2026-07-15T16:17:47.050",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.