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Ecto missing `is_nil` requirement

Critical severity GitHub Reviewed Published Apr 12, 2022 to the GitHub Advisory Database • Updated Jan 22, 2026

Package

erlang ecto (Erlang)

Affected versions

= 2.2.0

Patched versions

2.2.1

Description

Ecto will not raise on queries with non-explicit nil comparisons (ie if they aren't checked with is_nil).

References

Published to the GitHub Advisory Database Apr 12, 2022
Reviewed Apr 12, 2022
Last updated Jan 22, 2026

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(69th percentile)

Weaknesses

No CWEs

CVE ID

CVE-2017-20166

GHSA ID

GHSA-2xxx-fhc8-9qvq

Source code

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