CVE-2026-16910: 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 r

mediumCVSS 5.5CVE-2026-16910

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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 5.5
Published: 2026-07-24
Last updated: 2026-07-24
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-16910

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-169100.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-16910	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [UNPATCHED] [medium] Red Hat Quay: Vulnerability allows bypassing of security measurescert-bund

Recent advisories for Red Hat Quay's

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] Red Hat Quay: Vulnerability allows information disclosurecert-bund · 2026-07-30
medium[UPDATE] [medium] Red Hat Quay: Multiple vulnerabilitiescert-bund · 2026-07-30
medium[NEW] [UNPATCHED] [medium] Red Hat Quay: Vulnerability allows bypassing of security measurescert-bund · 2026-07-24
mediumCVE-2026-15927: A flaw was found in Red Hat Quay's repository-level mirror configuration feature. The POST and…nvd · 2026-07-21