CVE-2024-27456

Exp

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

Published: 2024-02-26 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-27456 is rated High Exploit Risk (69.8/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.77%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-27456

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-27456

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.15% 0.77% +0.62%
2 2026-03-16 0.13% 0.15% +0.02%
3 2025-11-21 — 0.13% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-27456

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.2 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-27456

GitHub Security Advisory for CVE-2024-27456

GHSA-785g-282q-pwvx · Severity: medium · Ecosystem: rubygems — Rack CORS Middleware has Insecure File Permissions

OS Trackers for CVE-2024-27456

vendor priority summary link
debian unimportant CVE-2024-27456 unimportant priority: Debian including 1 source packages (ruby-rack-cors), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-27456
redhat medium — https://access.redhat.com/security/cve/CVE-2024-27456
ubuntu negligible CVE-2024-27456 negligible priority: Ubuntu including 1 source packages (ruby-rack-cors), 8 status rows across 8 suites (bionic, focal, jammy, mantic, noble, trusty, upstream, xenial): not-affected 7, ignored 1. https://ubuntu.com/security/CVE-2024-27456

Affected software / configurations for CVE-2024-27456

Vendor Product Version Raw CPE
rylabs rack_cors_middleware 2.0.1 cpe:2.3:a:rylabs:rack_cors_middleware:2.0.1:*:*:*:*:*:*:*

References for CVE-2024-27456

URL Tags
https://github.com/cyu/rack-cors/issues/274 Exploit Issue Tracking Patch Third Party Advisory
cvelogic Threat Intelligence