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CVE-2026-77317

8.1 · HIGH

SeaweedFS is a distributed storage system for files and blobs.

Published Aug 26, 2026CWE-863EPSS 0.36%

Overview

CVE-2026-77317 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

SeaweedFS is a distributed storage system for files and blobs. In versions from 3.88 through 4.39, the SFTP server evaluates configured path permissions with a literal string-prefix comparison, so a user scoped to a path is also granted the same access to any sibling path whose name merely begins with the same characters. A user granted access to /tenants/alice therefore also matches /tenants/alice-archive, /tenants/alice2, and similar siblings, because the check does not require a path-component boundary. An authenticated low-privilege SFTP user with a root home directory and narrow path permissions can thereby cross the configured ACL boundary to read another tenant's files, and to overwrite them if granted write, all through the documented SFTP service with its own valid credentials. This issue is fixed in version 4.40.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/seaweedfs/seaweedfs/commit/29981f8d24a62e9571962c4534fb23c48c00bae2GitHubgithub.com/seaweedfs/seaweedfs/security/advisories/GHSA-fvpg-g364-j8vhGitHubgithub.com/seaweedfs/seaweedfs/security/advisories/GHSA-fvpg-g364-j8vh

How CyberStrike helps

Frequently asked questions

What is CVE-2026-77317?

CVE-2026-77317 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-77317?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-77317?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-77317?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-77317 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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