Fluid Attacks Database

Description

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, Rack::Directory’s path check used a string prefix match on the expanded path. A request like /../root_example/ can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
debian 11	ruby-rack	=2.1.4-3 \|\| =2.1.4-3+deb11u1 \|\| =2.1.4-3+deb11u2 \|\| =2.1.4-3+deb11u3 \|\| =2.1.4-3+deb11u4 \|\| >=0 <2.1.4-3+deb11u5	2.1.4-3+deb11u5
debian 12	ruby-rack	=2.2.13-1~deb12u1 \|\| =2.2.20-0+deb12u1 \|\| =2.2.6.4-1 \|\| =2.2.6.4-1+deb12u1 \|\| =2.2.7-1 \|\| =2.2.7-1.1 \|\| >=0 <2.2.22-0+deb12u1	2.2.22-0+deb12u1
debian 13	ruby-rack	=3.1.16-0.1 \|\| =3.1.18-1 \|\| =3.1.18-1~deb13u1 \|\| >=0 <3.1.20-0+deb13u1	3.1.20-0+deb13u1
debian 14	ruby-rack	=3.1.16-0.1 \|\| =3.1.18-1 \|\| =3.1.18-1~deb13u1 \|\| =3.2.4-1 \|\| >=0 <3.2.5-1	3.2.5-1
rubygems	rack	>=0 <2.2.22 \|\| >=3.0.0.beta1 <3.1.20 \|\| >=3.2.0 <3.2.5	2.2.22, 3.1.20, 3.2.5

Aliases

1. CVE-2026-228602. NVD-2026-228603. OSV-DEBIAN-2026-228604. OSV-2026-228605. GHSA-mxw3-3hh2-x2mh6. GCVE-2026-228607. SECURITY-TRACKER-CVE-2026-22860

References

1. https://github.com/rack/rack/security/advisories/GHSA-mxw3-3hh2-x2mh2. https://github.com/rack/rack/commit/75c5745c286637a8f049a33790c71237762069e73. https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2026-22860.yml

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