DEBIAN-CVE-2026-56866

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Source
https://security-tracker.debian.org/tracker/CVE-2026-56866
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56866.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-56866
Upstream
  • CVE-2026-56866
Published
2026-10-08T23:17:01Z
Modified
2026-10-09T05:00:08Z
Summary
[none]
Details

When http.Transport sends an HTTP/1 CONNECT request with a non-empty Request.Body, it writes the body directly to the connection without framing after the request headers. If the server rejects the CONNECT request with a non-2xx keep-alive response, Transport returns the connection to the idle pool. Because CONNECT requests do not have a request body, the server may interpret the trailing body bytes as a subsequent pipelined HTTP/1.1 request on the connection, leaving the pooled connection desynchronized and causing the next caller that reuses it to read the response to the injected request. In reverse proxies (including httputil.ReverseProxy) that forward CONNECT requests through a shared Transport, this can lead to cross-user response poisoning.

References

Affected packages

Debian:12 / golang-1.19

Package

Name
golang-1.19
Purl
pkg:deb/debian/golang-1.19?arch=source&distro=bookworm

Affected ranges

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

Affected versions

1.*
1.19.8-2
1.19.9-1
1.19.10-1
1.19.10-2
1.19.11-1
1.19.12-1
1.19.12-2~bpo11+1
1.19.12-2~bpo12+1
1.19.12-2
1.19.13-1~bpo11+1
1.19.13-1~bpo12+1
1.19.13-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56866.json"

Debian:13 / golang-1.24

Package

Name
golang-1.24
Purl
pkg:deb/debian/golang-1.24?arch=source&distro=trixie

Affected ranges

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

Affected versions

1.*
1.24.4-1
1.24.4-2
1.24.4-3
1.24.4-4
1.24.7-1
1.24.8-1
1.24.9-1
1.24.12-1
1.24.13-1
1.24.13-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56866.json"

Debian:14 / golang-1.25

Package

Name
golang-1.25
Purl
pkg:deb/debian/golang-1.25?arch=source&distro=forky

Affected ranges

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

Affected versions

1.*
1.25.0-1
1.25.0-2
1.25.1-1
1.25.2-1
1.25.3-1
1.25.6-1
1.25.7-1
1.25.7-2
1.25.8-1
1.25.9-1
1.25.10-1~bpo13+1
1.25.10-1
1.25.10-2~bpo13+1
1.25.10-2
1.25.11-1~bpo13+1
1.25.11-1
1.25.12-1~bpo13+1
1.25.12-1
1.25.13-1
1.25.14-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56866.json"

Debian:14 / golang-1.26

Package

Name
golang-1.26
Purl
pkg:deb/debian/golang-1.26?arch=source&distro=forky

Affected ranges

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

Affected versions

1.*
1.26~rc2-1
1.26~rc3-1
1.26~rc3-2
1.26.0-1
1.26.1-1
1.26.2-1
1.26.2-2
1.26.2-3
1.26.3-1~bpo13+1
1.26.3-1
1.26.3-2~bpo13+1
1.26.3-2
1.26.4-1~bpo13+1
1.26.4-1
1.26.5-1~bpo13+1
1.26.5-1
1.26.6-1
1.26.6-2
1.26.7-1~bpo13+1
1.26.7-1
1.26.8-1~bpo13+1
1.26.8-1
1.26.8-2
1.26.9-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56866.json"

Debian:14 / golang-1.27

Package

Name
golang-1.27
Purl
pkg:deb/debian/golang-1.27?arch=source&distro=forky

Affected ranges

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

Affected versions

1.*
1.27~rc1-1
1.27~rc2-1
1.27~rc3-1
1.27.0-1~bpo13+1
1.27.0-1
1.27.1-1
1.27.1-2~bpo13+1
1.27.1-2
1.27.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56866.json"