CVE-2026-19519: Red Hat Advanced Cluster Security 4 · Reachable Assertion
Affects Red Hat Advanced Cluster Security 4Source CVE Database V5
Not known to be exploited · CVSS 4.3 Medium.
Data as of 9 Nov 2026, 23:24 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 11 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red HatRed Hat Advanced Cluster Security 4 | Affected– | Fixed in– |
| Red HatRed Hat Quay 3 | Affected– | Fixed in– |
AI-suggested
Red Hat advises configuring the indexer to run scanner workloads in isolated processes or containers to prevent a single scanner panic from terminating the shared indexer. Alternatively, deploying multiple indexer replicas behind a load balancer can reduce the impact of a single process crash.
Description
A flaw was found in claircore's RPM package scanner. Crafted RPM header data in a container layer can cause an unchecked type assertion to panic the scanner. The panic is not recovered, causing the Clair indexer process to crash, leading to a denial of service.