UnratedRed Hat & Ubuntu Linux
Rack::Session vulnerability
USN-8190-2 Published Apr 28, 2026
CVE-2026-39324
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
USN-8190-1 fixed a vulnerability in Rack::Session. This update provides the corresponding update for Ubuntu 26.04 LTS. Original advisory details: SeungMyung Lee discovered that Rack::Session did not properly reject cookies upon decryption failure. A remote attacker could use this issue to manipulate session contents and possibly gain unauthorized access. Affected Ubuntu releases: 26.04. CVEs: CVE-2026-39324.
Affected versions
- Ubuntu 26.04
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
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