DEBIAN-CVE-2026-47737

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Source
https://security-tracker.debian.org/tracker/CVE-2026-47737
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47737.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-47737
Upstream
Published
2026-07-14T20:17:03Z
Modified
2026-09-14T17:03:16Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when set_remote_address proxy_protocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive request on the same connection, allowing an attacker to inject a second PROXY header and overwrite REMOTE_ADDR. This issue is fixed in versions 7.2.1 and 8.0.2.

References

Affected packages

Debian:12 / puma

Package

Name
puma
Purl
pkg:deb/debian/puma?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.6.5-3
5.6.5-3+deb12u1
5.6.5-4
5.6.7-1
6.*
6.0.2-1
6.4.0-1
6.4.0-2
6.4.0-3
6.4.0-4
6.4.2-1
6.4.2-2
6.4.2-3
6.4.2-4
6.4.2-5
6.4.2-6
6.4.3-1
6.4.3-2
6.4.3-3
6.6.0-1
6.6.0-2
6.6.0-3
6.6.0-4
8.*
8.0.2-1
8.0.2-2
8.0.2-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47737.json"

Debian:13 / puma

Package

Name
puma
Purl
pkg:deb/debian/puma?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.6.0-4
8.*
8.0.2-1
8.0.2-2
8.0.2-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47737.json"

Debian:14 / puma

Package

Name
puma
Purl
pkg:deb/debian/puma?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.0.2-1

Affected versions

6.*
6.6.0-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47737.json"