Path Traversal in Sylabs Singularity
CVE-2026-47215
SingularityCE and SingularityPRO are open source container platforms. Prior to SingularityCE 4.4.2 and SingularityPRO 4.3.9 and 4.1.14, incorrect path-string matching in the singularity.conf limit container paths directive allows a container in a sibling directory such as /data/safe-but-unsafe to be run when /data/safe is allowed under setuid mode. This permits a user to run a container from outside the administrator's configured path allowlist. Installations that do not use limit container paths are not affected. This issue is fixed in SingularityCE 4.4.2 and SingularityPRO 4.3.9 and 4.1.14.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (4.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 4.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Sylabs Singularity — versions < 4.4.2
- Sylabs Singularitypro — versions < 4.1.14, >= 4.2.0, < 4.3.9
Weakness classification (CWE)
References
- github.com/sylabs/singularity/security/advisories/GHSA-wqcr-7rf3-f64m
- github.com/sylabs/singularity/pull/4152
- github.com/sylabs/singularity/commit/c08791793e843d4c9c1f2fc1d9d12abef747378f
- github.com/sylabs/singularity/commit/c1dc9470a769e6e534b588a4ed521768ca4fc0d1
- github.com/sylabs/singularity/releases/tag/v4.4.2
Frequently asked questions
- What is CVE-2026-47215?
- CVE-2026-47215 is a medium-severity vulnerability in Sylabs Singularity, classified under Path Traversal. CVSS score: 4.8/10. Published 2026-09-15.
- How severe is CVE-2026-47215?
- Medium severity. CVSS v3 base score is 4.8 out of 10.