CVE-2026-26445 mdoi CVE debrief

Who should care

Users of stomper 5e2741e library, operators of affected systems, and security teams should be aware of this HIGH severity vulnerability and take necessary actions to mitigate potential Denial of Service attacks. Affected product deployments in managed environments require review and assignment of an owner for follow-up. Compensating controls should be reviewed for exposed systems while remediation is scheduled and verified. Monitoring, detection, and logs for exposed assets need extra review. Exceptions, retesting of remediated assets, and documentation of evidence are crucial before closing the item. Vulnerability management and security teams should prioritize patching to prevent potential Denial of Service attacks. Platform and operational impact assessments are necessary to ensure comprehensive mitigation. This vulnerability can cause significant disruption, emphasizing the need for prompt action and thorough verification of affected scope and severity. Security teams must verify that the affected product is not exposed to untrusted networks and implement necessary controls to prevent exploitation. The vulnerability's impact on operational security and potential for disruption underscores the importance of immediate attention and thorough mitigation strategies. Therefore, it is essential to review and apply patches from the vendor if available, implement compensating controls, and verify that the affected product is not exposed to untrusted networks. Additionally, tracking exceptions, retesting remediated assets, and closing the item only after evidence is documented are critical steps in managing this vulnerability effectively. The stomper 5e2741e library's vulnerability to Denial of Service attacks through partial STOMP frames necessitates a comprehensive review of affected product deployments and swift implementation of mitigations to prevent potential attacks. Users and operators must assess their exposure, prioritize patching, and implement defensive measures to minimize the risk of exploitation. By taking these steps, organizations can reduce the risk associated with this vulnerability and protect their systems from potential Denial of Service attacks.

Technical summary

The stomper 5e2741e library is vulnerable to a Denial of Service attack. A malicious client can send partial STOMP frames, keeping TCP connections open, which causes sockets to enter a permanent half-read state. This issue arises from the broker's use of edge-triggered epoll (EPOLLET) and MSG_PEEK in recv(). As a result, the broker may stop receiving epoll events for those sockets and eventually hang in epoll_wait, effectively refusing to process new messages.

Defensive priority

CVE-2026-26445 is rated HIGH with a CVSS score of 7.5. Users should prioritize patching to prevent potential Denial of Service attacks.

Recommended defensive actions

• Review and apply patches from the vendor if available.
• Implement compensating controls such as monitoring for unusual network activity.
• Verify that the affected product is not exposed to untrusted networks.
• 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-2026-26445 record indicates that stomper 5e2741e is vulnerable to Denial of Service. A malicious client can send partial STOMP frames and keep the TCP connections open, causing sockets to enter a permanent half-read state. The broker's use of edge-triggered epoll (EPOLLET) and MSG_PEEK in recv() contributes to this issue. Further analysis and verification are needed to fully understand the vulnerability's impact and affected scope.

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.