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CVE-2024-27456

Rack CORS Middleware has Insecure File Permissions

9.1 CriticalFix available

rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions for the .rb files.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

0.77%Up 0.7 points since Feb 26, 2024
90%50%10%1%

What each source reports

CVE List Score used 9.1

rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions for the .rb files.

Record
CVE-2024-27456
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-200
Updated
2026-11-02
EUVDEUVD-2024-0551 9.1

rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions for the .rb files.

Record
EUVD-2024-0551
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-785g-282q-pwvx No score

Rack CORS Middleware has Insecure File Permissions

rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions for the .rb files.

Record
GHSA-785g-282q-pwvx
Updated
2026-11-02
NVD 9.1

rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions for the .rb files.

Record
CVE-2024-27456
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-200
Updated
2026-11-02
OSV 9.1

rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions for the .rb files.

Record
CVE-2024-27456
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-02
OSVGHSA-785g-282q-pwvx No score

Rack CORS Middleware has Insecure File Permissions

rack-cors (aka Rack CORS Middleware) 2.0.1 has 0666 permissions for the .rb files.

Record
GHSA-785g-282q-pwvx
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
rack-cors
RubyGems
 2.0.1 to 2.0.1
2.0.2
rack-cors
RubyGems
 2.0.1 up to 2.0.2
2.0.2

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-27456 is a critical vulnerability (CVSS 9.1) in Rack-cors Project Rack-cors, published February 26, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. Fixed in rack-cors 2.0.2.

References

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