CVE-2021-26920
MEDIUMEPSS 95th pctlDescription
In the Druid ingestion system, the InputSource is used for reading data from a certain data source. However, the HTTP InputSource allows authenticated users to read data from other sources than intended, such as the local file system, with the privileges of the Druid server process. This is not an elevation of privilege when users access Druid directly, since Druid also provides the Local InputSource, which allows the same level of access. But it is problematic when users interact with Druid indirectly through an application that allows users to specify the HTTP InputSource, but not the Local InputSource. In this case, users could bypass the application-level restriction by passing a file URL to the HTTP InputSource.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Very high risk: more likely to be exploited than 95% of all known CVEs.
References
Related Vulnerabilities
Other CWE-610 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-27593 | Critical | 10.0 | 88% | KEV + Ransom | Fix |
| CVE-2017-18357 | Medium | 6.5 | 27% | - | Fix |
| CVE-2022-2633 | High | 7.5 | 26% | - | - |
| CVE-2017-0211 | Medium | 5.5 | 14% | - | - |
| CVE-2024-45826 | Medium | 6.8 | 12% | - | Fix |
| CVE-2020-5412 | Medium | 6.5 | 10% | - | Fix |
Common questions
How do I fix CVE-2021-26920?
Upgrade druid to 0.22.0 or later.
Is CVE-2021-26920 being actively exploited?
Not that we know of. CVE-2021-26920 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 9.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 95% of all scored CVEs.
How severe is CVE-2021-26920?
CVE-2021-26920 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2021-26920 affect?
Published advisories record a fix for druid (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2021-26920
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.