EUVD Vulnerability Catalog
EUVD-2026-81070
Severity: CRITICAL
Base Score: 9.3
CVSS Version: 4.0
Vulnerability Description
Decap CMS before 3.11.0 contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.
CVSS Vector Analysis
Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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Attack Vector (AV): Network
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Attack Complexity (AC): Low
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Attack Requirements (AT): None
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Privileges Required (PR): None
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User Interaction (UI): None
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Vulnerability Confidentiality Impact (VC): High
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Vulnerability Integrity Impact (VI): High
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Vulnerability Availability Impact (VA): High
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Subsequent Confidentiality Impact (SC): None
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Subsequent Integrity Impact (SI): None
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Subsequent Availability Impact (SA): None
Affected Vendors & Systems
Vendor
decaporg
References & Advisory Links
- https://github.com/decaporg/decap-cms/security/advisories/GHSA-5rrq-v82w-qpfr
- https://github.com/geo-chen/oss/blob/main/decap-cms.md
- https://github.com/decaporg/decap-cms/releases?page=2#[email protected]
- https://www.vulncheck.com/advisories/decap-cms-path-traversal-via-sibling-directory-prefix-matching
Metadata Profile
Database Authority
European Union Agency for Cybersecurity (ENISA) EUVD
Assigner
VulnCheck
EPSS Probability
0.44
Known Aliases
GHSA-fjm6-6gxh-mvf2
CVE-2026-92812
Published On
2026-09-16
Last Updated
2026-10-28