CVE & CISA-KEV Catalog

CVE-2022-45442

HIGH
8.8
CVSS v3
NVD

Description

Sinatra is a domain-specific language for creating web applications in Ruby. An issue was discovered in Sinatra 2.0 before 2.2.3 and 3.0 before 3.0.4. An application is vulnerable to a reflected file download (RFD) attack that sets the Content-Disposition header of a response when the filename is derived from user-supplied input. Version 2.2.3 and 3.0.4 contain patches for this issue.

CWE-494

How to fix

Remediation Available
ruby-sinatraDebian
Fixed in:2.0.8.1-2+deb11u1CVE-2022-45442
Fixed in:3.0.5-2CVE-2022-45442
Fixed in:3.0.5-2CVE-2022-45442
Fixed in:3.0.5-2CVE-2022-45442
ruby-sinatraUbuntu
Fixed in:1.4.7-3ubuntu0.1~esm2USN-7664-1
Fixed in:1.4.8-1ubuntu0.1~esm2USN-7664-1
Fixed in:2.0.8.1-1ubuntu0.1~esm2USN-7664-1
Fixed in:2.0.8.1-2+deb11u1build0.22.04.1USN-7664-1

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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

0.64%probability of exploitation in 30 days
47thpercentile

Moderate risk: more likely to be exploited than 47% of all known CVEs.

References

Exploit1
Third-Party Advisory2

Related Vulnerabilities

Other CWE-494 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2020-5398High7.588%-Fix
CVE-2022-40799High8.832%KEV-
CVE-2026-3502High7.85.8%KEVFix
CVE-2018-19234High8.83.3%-Fix
CVE-2016-6567Critical9.82.9%--
CVE-2016-6564High8.12.7%--

Common questions

How do I fix CVE-2022-45442?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2022-45442 being actively exploited?

Not that we know of. CVE-2022-45442 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.64% is the estimated probability that it will be exploited in the next 30 days. That is higher than 47% of all scored CVEs.

How severe is CVE-2022-45442?

CVE-2022-45442 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2022-45442 affect?

Published advisories record a fix for ruby-sinatra (Debian), ruby-sinatra (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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 2025-11-04.