CVE-2026-73160 MISP CVE debrief

Who should care

Users of the cti-transmute library, particularly those with internal networks that may be vulnerable to SSRF attacks, should apply the fix and monitor for suspicious activity. This includes reviewing the server's internal network configuration and segmentation to prevent potential attacks. Security teams should prioritize this vulnerability due to its high CVSS score of 8.7 and the potential for significant impact on internal networks. Immediate attention is required to apply the fix and verify the server's configuration. Additionally, defenders should consider compensating controls for exposed systems while remediation is scheduled and verified. Monitoring and detection capabilities should be reviewed to ensure they can identify potential exploitation attempts. Asset inventory and vulnerability management processes should also be updated to reflect this vulnerability and track exceptions and retest remediated assets. Rollback and change windows should be planned carefully to minimize disruption. Source tracking and incident response plans should be updated to address this type of vulnerability. The fix involves not only applying the patch but also verifying its effectiveness and ensuring that the server's internal network configuration and segmentation are secure. This requires a coordinated effort from various teams, including IT, security, and operations. The goal is to prevent attackers from exploiting this vulnerability to gain unauthorized access to internal networks and sensitive data. By prioritizing this vulnerability and taking immediate action, defenders can reduce the risk of exploitation and protect their internal networks. The vulnerability's impact can be significant, and its exploitation can lead to unauthorized access, data breaches, or other security incidents. Therefore, it is essential to apply the fix, monitor for suspicious activity, and verify the server's internal network configuration and segmentation to prevent potential attacks. The fix and verification process should be documented, and evidence of remediation should be tracked to ensure that the vulnerability is properly addressed. This may involve updating incident response plans, IT

Technical summary

The cti-transmute library contains an SSRF vulnerability in its /fetch_misp_event and /misp_search_events endpoints. The URL validation routine did not properly resolve hostnames, allowing attackers to make internal network requests. The fix resolves hostnames using socket.getaddrinfo() and checks for global routability. This change ensures that the server does not issue requests into its internal network.

Defensive priority

This SSRF vulnerability in cti-transmute's /fetch_misp_event and /misp_search_events endpoints allows attackers to make internal network requests, posing a significant risk. Immediate attention is required to apply the fix that resolves hostnames and checks for global routability.

Recommended defensive actions

• Apply the fix that resolves hostnames using socket.getaddrinfo() and checks for global routability.
• Restrict access to the affected MISP fetch/search routes.
• Monitor for suspicious activity on the cti-transmute server.
• Verify the server's internal network configuration and segmentation.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Update incident response plans to address this type of vulnerability.

Evidence notes

The source corpus provides details on the SSRF vulnerability in cti-transmute, including the flawed URL validation routine and the fix that resolves hostnames using socket.getaddrinfo(). Further analysis is needed to fully understand the vulnerability's impact and affected scope. The evidence is limited, and defenders should verify the internal network configuration and segmentation. The fix explicitly states that anonymous callers could make the server request the internal target and read the response.

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.