CVE-2026-16254Network attack vector

Indexer crash via malformed APK package database

Published Jul 20, 2026 · Updated Jul 20, 2026

Out-of-bounds read in the APK scanner for Red Hat Quay 3 and Advanced Cluster Security 4 allows remote authenticated users to crash its indexer. The installed-database parser slices malformed APK package data from a crafted container layer without checking the slice bounds, which triggers a panic. An attacker must be able to submit an image for indexing; Kubernetes normally restarts the failed pod, limiting impact to a temporary indexing interruption.

CVSS severity4.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the APK scanner for Red Hat Quay 3 and Advanced Cluster Security 4 allows remote authenticated users to crash its indexer. The installed-database parser slices malformed APK package data from a crafted container layer without checking the slice bounds, which triggers a panic. An attacker must be able to submit an image for indexing; Kubernetes normally restarts the failed pod, limiting impact to a temporary indexing interruption.

The record

CVE
CVE-2026-16254
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
389 Directory Server
Product
Red Hat Quay
Classifications
CWE-125, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat QuayAffected versions are unavailable in this record.
389 Directory Server · Red Hat Advanced Cluster Security for KubernetesAffected versions are unavailable in this record.

Published CVSS scores

4.3Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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