CVE-2026-76235 Red Hat CVE debrief

Who should care

System administrators and security teams responsible for cockpit-ws and Red Hat products should be aware of this vulnerability and take immediate action to mitigate potential risks. Affected operators, platforms, and security teams should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed and review compensating controls for exposed systems while remediation is scheduled and verified. Monitoring, detection, and logs for exposed assets should be checked for extra review. Exceptions, retested remediated assets, and closed items should be tracked only after evidence is documented. Asset inventory and vulnerability management teams should also be informed to ensure proper tracking and mitigation of the vulnerability. Security teams should prioritize defensive actions based on the HIGH CVSS score of 7.5 and the potential for denial of service attacks. They should also verify whether affected product deployments exist in managed environments and assign an owner for follow-up. Additionally, they should track the status of vendor remediation and apply it if available. Compensating controls should be implemented to mitigate potential impact, and monitoring should be in place to detect and respond to potential exploitation attempts. Finally, they should review relevant documentation and records to ensure that all necessary steps are taken to address the vulnerability effectively and efficiently across the organization. Security teams should also consider the potential operational impact of the vulnerability and prioritize defensive actions accordingly. They should also ensure that all affected systems are properly updated or patched to prevent exploitation. By taking these steps, security teams can help prevent potential attacks and minimize the risk associated with this vulnerability. The CVE record indicates a memory leak flaw in cockpit-ws, and evidence is limited; further verification is recommended. Security teams should also be aware of the source-confidence limits and review context to at

Technical summary

CVE-2026-76235 is a HIGH severity vulnerability in cockpit-ws with a CVSS score of 7.5. A memory leak flaw was found in the login page handler, which leaks a heap allocation on every unauthenticated request carrying a CockpitLang cookie. This allows a remote unauthenticated attacker to exhaust memory on the host and cause a denial of service. The vulnerability affects cockpit-ws and Red Hat products. System administrators and security teams responsible for cockpit-ws and Red Hat products should be aware of this vulnerability and take immediate action to mitigate potential risks. Evidence is limited; further verification is recommended.

Defensive priority

CVE-2026-76235 has a HIGH CVSS score of 7.5. Consider immediate defensive actions.

Recommended defensive actions

• Verify and apply vendor remediation if available
• Implement compensating controls to mitigate potential impact
• Monitor for and respond to potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE-2026-76235 record indicates a memory leak flaw in cockpit-ws. The login page handler leaks a heap allocation on every unauthenticated request that carries a CockpitLang cookie, allowing a remote unauthenticated attacker to exhaust memory on the host and cause a denial of service. Evidence is limited; further verification is recommended.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.