CVE-2017-11173: n/a vulnerability

CVE-2017-11173: Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 17:57 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2017-11173 is a CORS allowlist bypass in rack-cors before 0.4.1. A site that looks related to a trusted domain could be accepted by mistake, letting a malicious third-party site make CORS requests that policy owners intended to block. Exposure is most likely in applications using rack-cors before 0.4.1 with CORS rules based on trusted domain names. The bundle does not provide CPEs, package inventory data, or affected downstream product details. Treat this as a targeted web application policy bypass, not a broad infrastructure emergency. Prioritize internet-facing applications that rely on strict CORS allowlists to protect sensitive browser-accessible data or authenticated API flows. Mitigation focus: Upgrade rack-cors to 0.4.1 or a vendor package containing the upstream fix.; Review CORS allowlists for domain patterns that should match only exact trusted origins.; Apply Debian DSA-3931 guidance where Debian-packaged rack-cors is used..

Prepared: Jun 13, 2026, 04:25 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 13, 2017, 03:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.htmlCVE reference · x_refsource_MISC
https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6CVE reference · x_refsource_MISC

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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