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CVE-2020-36939: Cassandra Web - Remote File Read

January 27, 2026 (updated September 8, 2026)

Cassandra Web 0.5.0 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating path traversal parameters. Attackers can exploit the disabled Rack::Protection module to read sensitive system files like /etc/passwd and retrieve Apache Cassandra database credentials.

References

  • github.com/advisories/GHSA-8mfv-xhp5-48q9
  • github.com/rubysec/ruby-advisory-db/blob/master/gems/cassandra-web/CVE-2020-36939.yml
  • nvd.nist.gov/vuln/detail/CVE-2020-36939
  • rubygems.org/gems/cassandra-web/versions/0.5.0
  • www.exploit-db.com/exploits/49362
  • www.vulncheck.com/advisories/cassandra-web-remote-file-read

Code Behaviors & Features

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Affected versions

All versions up to 0.5.0

Solution

Unfortunately, there is no solution available yet.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Source file

gem/cassandra-web/CVE-2020-36939.yml

Spotted a mistake? Edit the file on GitLab.

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