What’s Vulnerable › Vulnerabilities

CVE-2020-15110: Possible pod name collisions in jupyterhub-kubespawner

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-07-17 · updated 2026-06-17
• Weakness: CWE-863

Description

In jupyterhub-kubespawner before 0.12, certain usernames will be able to craft particular server names which will grant them access to the default server of other users who have matching usernames. This has been fixed in 0.12.

Affected products

• jupyterhub kubespawner: before 0.12 — fixed in 0.12

How to fix

Upgrade to a fixed version: jupyterhub kubespawner 0.12. Check the vendor advisory for mitigations.

References

• https://github.com/jupyterhub/kubespawner/commit/3dfe870a7f5e98e2e398b01996ca6b8eff4bb1d0
• https://github.com/jupyterhub/kubespawner/security/advisories/GHSA-v7m9-9497-p9gr
• https://github.com/jupyterhub/kubespawner/commit/3dfe870a7f5e98e2e398b01996ca6b8eff4bb1d0
• https://github.com/jupyterhub/kubespawner/security/advisories/GHSA-v7m9-9497-p9gr

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