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CVE-2026-34763

Rack: Rack::Directory info disclosure and DoS via unescaped regex interpolation

Published: Apr 2, 2026Updated: Jul 24, 2026 Sources: CVE List NVD BDUCWE-625
5.3MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 84.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, *, or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem path in the HTML output. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-625

Affected Products

Red Hat Inc.
commercial·USaka red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
Red Hat 3scale API Management PlatformOn-prem
Operating Systems / linux-distro
Logging subsystem for Red Hat OpenShiftOn-prem
Operating Systems / linux-distro
rack
oss-project
rackLibrary
OSS Libraries / web-framework
Canonical Ltd.
commercial·GBaka canonical
UbuntuOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
RackLibrary
OSS Libraries / web-framework

Exploitability

Official Patch Available
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References

https://github.com/rack/rack/security/advisories/GHSA-7mqq-6cf9-v2qp
github.com
https://github.com/rack/rack
github.com
https://github.com/rack/rack/security/advisories/GHSA-7mqq-6cf9-v2qp
github.com
and 4 more references View all →

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