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CVE-2024-27456

28
FAUCET Score

CVE-2024-27456 describes a critical vulnerability in rylabs rack_cors_middleware (rack-cors) version 2.0.1, where .rb files have insecure 0666 permissions. This flaw, rated 9.1 CVSS (Critical), allows an unauthenticated attacker to achieve high confidentiality and integrity impact with low attack complexity, as it is network-exploitable. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.1CPE matchmatch criteria
cpe:2.3:a:rylabs:rack_cors_middleware:2.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 35th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: rack-corsFixed in: 2.0.2

Vendor Advisories (2)

rubygemsGHSA-785g-282q-pwvxmedium

Rack CORS Middleware has Insecure File Permissions

Feb 26, 2024
redhatCVE-2024-27456Moderate

rack-cors: Insecure File Permissions in rack-cors

Feb 26, 2024

References

github.com / cyu/rack-cors/issues/274
ExploitIssue TrackingPatchThird Party Advisory