CVE-2022-45442 — Sinatra is a domain-specific language for creating web applications in Ruby
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 whe
Published
2022-11-28T00:00:00.000Z
Last modified
2025-11-04T16:09:56.861Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| sinatra | sinatra | >= 3.0, < 3.0.4, >= 2.0, < 2.2.3 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2022-11-28T00:00:00.000Z
- Last modified: 2025-11-04T16:09:56.861Z
09References
- github.com — https://github.com/sinatra/sinatra/security/advisories/GHSA-2x8x-jmrp-phxw
- github.com — https://github.com/sinatra/sinatra/commit/ea8fc9495a350f7551b39e3025bfcd06f49f36…
- github.com — https://github.com/advisories/GHSA-8x94-hmjh-97hq
- www.blackhat.com — https://www.blackhat.com/docs/eu-14/materials/eu-14-Hafif-Reflected-File-Downloa…
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/01/msg00005.html
Want this in your SOAR or SIEM?
SARA's API returns EPSS, CVSS, KEV, and an analyst-grade summary in one call.
Read the API reference →