PatchSiren cyber security CVE debrief
CVE-2026-58499 EverMind-AI CVE debrief
CVE-2026-58499 is a high-severity path traversal vulnerability in EverOS, a memory runtime for agents. The vulnerability exists in the POST /api/v1/memory/add ingestion endpoint due to insufficient validation of the sender_id field, allowing an unauthenticated attacker to create or overwrite .md files outside the configured memory root. This issue is fixed in version 1.0.1. Users of EverOS, especially those with untrusted or internet-facing deployments, should apply the patch to prevent potential attacks. The vulnerability arises from the lack of path safety validation in the sender_id field used in the POST /api/v1/memory/add endpoint.
- Vendor
- EverMind-AI
- Product
- EverOS
- CVSS
- HIGH 8.2
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-10
- Original CVE updated
- 2026-07-10
- Advisory published
- 2026-07-10
- Advisory updated
- 2026-07-10
Who should care
Users of EverOS, especially those with untrusted or internet-facing deployments, should apply the patch in version 1.0.1 to prevent potential attacks. Affected operators, platforms, vulnerability-management, and security teams should review their current configurations and ensure that appropriate compensating controls are in place.
Technical summary
The vulnerability arises from the lack of path safety validation in the sender_id field used in the POST /api/v1/memory/add endpoint. This field is used to construct the filesystem path where extracted episodes are persisted as Markdown files. An attacker could exploit this by providing a sender_id containing ../ sequences, potentially directing writes outside the configured memory root and allowing the creation or overwriting of .md files at locations writable by the server process with partially attacker-influenced content.
Defensive priority
High priority should be given to applying the patch in version 1.0.1. Users should also review their current configurations and ensure that appropriate compensating controls are in place.
Recommended defensive actions
- Apply the patch in EverOS version 1.0.1
- Review and restrict access to the POST /api/v1/memory/add endpoint
- Monitor for suspicious .md file creations or modifications
- Implement additional access controls and monitoring for the EverOS deployment
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
- 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
Evidence notes
The CVE record was published on 2026-07-10T21:17:00.197Z and has not been modified since then. The NVD entry is currently being reviewed. Evidence limits suggest that further verification is needed to confirm affected scope and severity. Defenders should verify the official advisory and CVE record to validate affected scope, severity, and vendor guidance.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-10T21:17:00.197Z and has not been modified since then.