Container path restriction bypass via string-prefix matching
Published Sep 15, 2026 · Updated Sep 15, 2026
Path restriction bypass in Sylabs SingularityCE and SingularityPRO allows local users to run containers outside configured allowed paths. The Image.AuthorizedPath function treats a path as authorized when its string merely starts with an allowed directory name, so a sibling such as /data/safe-but-unsafe matches /data/safe. Exposure requires an affected release, native setuid mode, a non-root user, and a non-NULL limit container paths directive; the result is execution of an administrator-disallowed container.
Summary
What happened
Path restriction bypass in Sylabs SingularityCE and SingularityPRO allows local users to run containers outside configured allowed paths. The Image.AuthorizedPath function treats a path as authorized when its string merely starts with an allowed directory name, so a sibling such as /data/safe-but-unsafe matches /data/safe. Exposure requires an affected release, native setuid mode, a non-root user, and a non-NULL limit container paths directive; the result is execution of an administrator-disallowed container.
The record
- CVE
- CVE-2026-47215
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Vendor
- Sylabs
- Product
- SingularityCE
- Classifications
- CWE-22, T1610
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 15, 2026CVE publishedPublication date reported by the CVE source.
- Sep 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 4.4.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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