CVE catalog

CVE-2024-21510

ruby-sinatra: CVE-2024-21510

Severity: Medium · CVSS 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Published: Nov 1, 2024, 5:00:04 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.49% · Oct 25, 2026

Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied, it is possible to trigger an Open Redirect Attack by inserting an arbitrary address into this header. If used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ruby-sinatra	sid	`4.2.1-5`	fixed
Debian	ruby-sinatra	forky	`4.2.1-5`	fixed
Debian	ruby-sinatra	trixie	`4.1.1-5`	fixed
Debian	ruby-sinatra	bookworm	`3.0.5-3+deb12u1`	vulnerable
Ubuntu	ruby-sinatra	pro	`2.0.5-4ubuntu1`	vulnerable
Ubuntu	ruby-sinatra	pro	`2.0.8.1-1`	vulnerable
Ubuntu	ruby-sinatra	pro	`2.0.8.1-1ubuntu0.1~esm2`	vulnerable
Ubuntu	ruby-sinatra	pro	`2.0.8.1-1ubuntu0.1~esm3`	vulnerable
Ubuntu	ruby-sinatra	22.04	`2.0.8.1-2`	vulnerable
Ubuntu	ruby-sinatra	22.04	`2.0.8.1-2+deb11u1build0.22.04.1`	vulnerable
Ubuntu	ruby-sinatra	24.04	`3.0.5-3`	vulnerable
Ubuntu	ruby-sinatra	24.04	`3.0.5-3ubuntu1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ruby-sinatra	source	sid	`4.1.1-2`	not yet assigned	Not reported	[1087290]
Debian	ruby-sinatra	source	forky	`4.1.1-2`	not yet assigned	Not reported	[1087290]
Debian	ruby-sinatra	source	trixie	`4.1.1-2`	not yet assigned	Not reported	[1087290]
Debian	ruby-sinatra	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1087290]

[Debian bug #1087290]

Notes

[bookworm] ruby-sinatra: Minor issue, too intrusive to backport

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[ruby-rack-protection]Affected
Source package: [ruby-sinatra]
Details (2)
- 3.0.5-3+deb12u1 · all · bookworm
  Affected
  dsa · ruby-sinatra · debian · bookworm; dsa · ruby-sinatra · debian · 12
- 3.0.5-3+deb12u1 · all · bookworm
  Affected
  dsa · ruby-sinatra · debian · bookworm; dsa · ruby-sinatra · debian · 12
[ruby-sinatra]Affected
Details (2)
- 3.0.5-3+deb12u1 · all · bookworm
  Affected
  dsa · ruby-sinatra · debian · bookworm; dsa · ruby-sinatra · debian · 12
- 3.0.5-3+deb12u1 · all · bookworm
  Affected
  dsa · ruby-sinatra · debian · bookworm; dsa · ruby-sinatra · debian · 12
[ruby-sinatra-contrib]Affected
Source package: [ruby-sinatra]
Details (2)
- 3.0.5-3+deb12u1 · all · bookworm
  Affected
  dsa · ruby-sinatra · debian · bookworm; dsa · ruby-sinatra · debian · 12
- 3.0.5-3+deb12u1 · all · bookworm
  Affected
  dsa · ruby-sinatra · debian · bookworm; dsa · ruby-sinatra · debian · 12

[Debian 13 (Trixie)]

[ruby-rack-protection]Fixed
Source package: [ruby-sinatra]
Details (2)
- 4.1.1-5 · all · trixie
  Fixed · Fixed: 4.1.1-2
  dsa · ruby-sinatra · debian · 13
- 4.1.1-5 · all · trixie
  Fixed · Fixed: 4.1.1-2
  dsa · ruby-sinatra · debian · 13
[ruby-sinatra]Fixed
Details (2)
- 4.1.1-5 · all · trixie
  Fixed · Fixed: 4.1.1-2
  dsa · ruby-sinatra · debian · 13
- 4.1.1-5 · all · trixie
  Fixed · Fixed: 4.1.1-2
  dsa · ruby-sinatra · debian · 13
[ruby-sinatra-contrib]Fixed
Source package: [ruby-sinatra]
Details (2)
- 4.1.1-5 · all · trixie
  Fixed · Fixed: 4.1.1-2
  dsa · ruby-sinatra · debian · 13
- 4.1.1-5 · all · trixie
  Fixed · Fixed: 4.1.1-2
  dsa · ruby-sinatra · debian · 13

Observed: Oct 27, 2026, 1:04:34 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]