Is CVE-2017-11173 in the CISA KEV catalog?

No. CVE-2017-11173 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-11173?

CVE-2017-11173 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2017-11173?

CVE-2017-11173 has an EPSS score of 2.34% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-11173?

Upgrade ruby-rack-cors on debian 11 to 0.4.1-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-11173

HIGHEPSS 82th pctl

8.8

CVSS v3

NVD

Description

Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests. If the configuration were intended to allow only the trusted example.com domain name and not the malicious example.net domain name, then example.com.example.net (as well as example.com-example.net) would be inadvertently allowed.

How to fix

Remediation Available

ruby-rack-corsDebian

Fixed in:0.4.1-1CVE-2017-11173

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.34%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.