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  4. CVE 2026 16910 quay ssrf in red hat quay notification webhooks
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Back to active CVEs
Medium · CVSS 5.5CVE-2026-16910

Quay: ssrf in red hat quay notification webhooks (slack/generic)CVE-2026-16910

Answer in brief

CVE-2026-16910 records a Medium severity (CVSS 5.5) vulnerability in Quay: ssrf in red hat quay notification webhooks (slack/generic). The current sources do not mark it as known exploited. The current feed maps Red Hat/openshift-update-service/openshift-update-service-rhel8 (generic), Red Hat/quay/quay-rhel9 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 24, 2026Updated Nov 1, 2026Source checked Nov 1, 2026First seen by HOL Nov 1, 2026Material review Nov 1, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/openshift-update-service/openshift-update-service-rhel8 (generic), Red Hat/quay/quay-rhel9 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/openshift-update-service/openshift-update-service-rhel8generic*Not reported
Red Hat/quay/quay-rhel9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/openshift-update-service/openshift-update-service-rhel8, Red Hat/quay/quay-rhel9.
  2. 2Review the reported fix. Source-reported workaround: Restrict network egress from Quay worker pods/containers using network policies or firewall rules to block outbound connections to internal network ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) and cloud metadata endpoints (169.254.169.254). Limit repository creation and admin privileges to trusted users. Configure WEBHOOK_HOSTNAME_BLACKLIST in Quay config to include known internal hostnames and IP ranges.

Evidence timeline and material changes

  1. Published upstream

    Jul 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 1, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

A flaw was found in Red Hat Quay's notification webhook feature. The Slack and generic webhook notification handlers accept user-supplied URLs without SSRF validation, allowing a repository administrator to make the Quay worker issue POST requests to internal network addresses or cloud infrastructure endpoints that should not be reachable from the application.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
SSRF
EPSS
Not reported
CWE IDs
CWE-918
Source
CVE List V5
Source checked
Nov 1, 2026
References
2 linked sources
Open source record