What’s Vulnerable › Vulnerabilities

CVE-2021-33027

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-19 · updated 2026-06-17
• Weakness: CWE-331

Description

Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.

Affected products

• sylabs singularity: from 1.2.0 before 1.2.6; from 1.3.0 before 1.3.4; from 1.4.0 before 1.4.4; from 1.5.0 before 1.5.4; from 1.6.0 before 1.6.3 — fixed in 1.2.6, 1.3.4, 1.4.4, 1.5.4, 1.6.3

How to fix

Upgrade to a fixed version: sylabs singularity 1.2.6, 1.3.4, 1.4.4, 1.5.4. Check the vendor advisory for mitigations.

References

• https://medium.com/sylabs
• https://support.sylabs.io/a/solutions/articles/42000086439
• https://medium.com/sylabs
• https://support.sylabs.io/a/solutions/articles/42000086439

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