CVE-2026-44511
high
CVSS v3
7.4
CVSS v4 NEW
—
VIR risk
7.4
Description
katalyst-koi: Session cookies can be replayed after user logout
Predictions
Exploit likelihood
82%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | katalyst-koi | <~> 4.20.0 | ~> 4.20.0 |
| RubyGems | katalyst-koi | <4.20.0 | 4.20.0 |
| RubyGems | katalyst-koi | >=5.0.0,<5.6.0 | 5.6.0 |
| RUBYGEMS | katalyst-koi | >= 5.0.0, < 5.6.0 | 5.6.0 |
| RUBYGEMS | katalyst-koi | < 4.20.0 | 4.20.0 |
References
- https://github.com/katalyst/koi/security/advisories/GHSA-4cx3-3c38-j9vv
- https://nvd.nist.gov/vuln/detail/CVE-2026-44511
- https://github.com/katalyst/koi
- https://guides.rubyonrails.org/v5.2.0/security.html#replay-attacks-for-cookiestore-sessions
- https://github.com/advisories/GHSA-4cx3-3c38-j9vv
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/katalyst-koi/CVE-2026-44511.yml
CWEs
CWE-613
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.