DEBIAN-CVE-2026-123866

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Source
https://security-tracker.debian.org/tracker/CVE-2026-123866
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123866.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-123866
Upstream
  • CVE-2026-123866
Published
2026-11-11T19:17:33Z
Modified
2026-11-12T07:00:08Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

A use-after-free in Node.js HTTP/2 stream teardown can leak response memory, including the contents of other connections' response buffers, to a peer. When a stream is torn down while a write is still backpressured, for example by a peer RST_STREAM or by the server's own per-stream timeout destroying the stream, the stream's response buffer is freed but a reference to it is still used, so freed or unrelated heap memory is written to the socket instead of the intended response. On Node.js 26.x and 24.x the teardown can be driven purely by a remote peer once the window-size change from 26.9.0 and 24.22.0 is present, and on all supported lines the same defect is reachable through an application-initiated teardown such as a per-stream idle timeout. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

References

Affected packages

Debian:12 / nodejs

Package

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

Affected ranges

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

Affected versions

18.*
18.13.0+dfsg1-1
18.13.0+dfsg1-1.1
18.19.0+dfsg-1
18.19.0+dfsg-2
18.19.0+dfsg-3
18.19.0+dfsg-4
18.19.0+dfsg-5
18.19.0+dfsg-6~deb12u1
18.19.0+dfsg-6~deb12u2
18.19.0+dfsg-6
18.19.1+dfsg-1
18.19.1+dfsg-2
18.19.1+dfsg-3
18.19.1+dfsg-3.1
18.19.1+dfsg-4
18.19.1+dfsg-6
18.20.1+dfsg-1
18.20.1+dfsg-2
18.20.1+dfsg-3
18.20.1+dfsg-4
18.20.4+dfsg-1~deb12u1
18.20.4+dfsg-1~deb12u2
18.20.4+dfsg-1~deb12u3
20.*
20.10.0+dfsg-1
20.12.2+dfsg-1
20.13.0+dfsg-1
20.13.1+dfsg-1
20.13.1+dfsg-2
20.14.0+dfsg-1
20.14.0+dfsg-2
20.14.0+dfsg-3
20.15.0+dfsg-1
20.15.1+dfsg-1
20.16.0+dfsg-1
20.17.0+dfsg-1
20.17.0+dfsg-2
20.18.0+dfsg-1
20.18.0+dfsg-2
20.18.1+dfsg-1
20.18.1+dfsg-2
20.18.2+dfsg-1
20.18.2+dfsg-2
20.18.2+dfsg-3
20.18.2+dfsg-4
20.18.3+dfsg-1
20.19.0+dfsg-1
20.19.0+dfsg-2
20.19.0+dfsg1-1
20.19.2+dfsg-1
20.19.4+dfsg-1
20.19.5+dfsg+~cs20.19.12-1
20.19.5+dfsg+~cs20.19.12-2
20.19.5+dfsg+~cs20.19.12-3
20.19.5+dfsg+~cs20.19.12-4
20.19.5+dfsg+~cs20.19.24-1
22.*
22.12.0+dfsg-1
22.12.0+dfsg-2
22.12.0+dfsg-3
22.14.0+dfsg-1
22.18.0+dfsg-1
22.18.0+dfsg+~cs22.17.2-1
22.18.0+dfsg+~cs22.17.2-2
22.19.0+dfsg+~cs22.18.0-1
22.21.1+dfsg+~cs22.19.0-1
22.21.1+dfsg+~cs22.19.0-2
22.21.1+dfsg+~cs22.19.0-3
22.21.1+dfsg+~cs22.19.0-4
22.21.1+dfsg+~cs22.19.0-5
22.21.1+dfsg+~cs22.19.0-6
22.22.0+dfsg+~cs22.19.6-1
22.22.0+dfsg+~cs22.19.13-1
22.22.0+dfsg+~cs22.19.13-2
22.22.1+dfsg+~cs22.19.15-1
22.22.2+dfsg+~cs22.19.15-1
22.22.2+dfsg+~cs22.19.15-3
24.*
24.11.1+dfsg+~cs24.10.1-1
24.11.1+dfsg+~cs24.10.1-2
24.12.0+dfsg+~cs24.10.4-1
24.13.0+dfsg+~cs24.10.7-1
24.13.0+dfsg+~cs24.10.7-2
24.14.0+dfsg+~cs24.12.0-1
24.14.0+dfsg+~cs24.12.0-2
24.14.1+dfsg+~cs24.12.0-1
24.15.0+dfsg+~cs24.12.2-1
24.16.0+dfsg+~cs24.13.1-1
24.16.0+dfsg+~cs24.13.1-2
24.17.0+dfsg+~cs24.13.2-1
24.18.0+dfsg+~cs24.13.2-1
24.19.0+dfsg+~cs24.13.3-1
24.20.0+dfsg+~cs24.13.3-1
24.20.0+dfsg+~cs24.13.3-2
24.21.0+dfsg+~cs24.13.4-1
24.22.0+dfsg+~cs24.19.2-1
24.22.0+dfsg+~cs24.19.2-2
24.22.1+dfsg+~cs24.19.2-1
24.22.2+dfsg+~cs24.19.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123866.json"

Debian:13 / nodejs

Package

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

Affected ranges

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

Affected versions

20.*
20.19.2+dfsg-1
20.19.2+dfsg-1+deb13u1
20.19.2+dfsg-1+deb13u2
20.19.2+dfsg-1+deb13u3
20.19.4+dfsg-1
20.19.5+dfsg+~cs20.19.12-1
20.19.5+dfsg+~cs20.19.12-2
20.19.5+dfsg+~cs20.19.12-3
20.19.5+dfsg+~cs20.19.12-4
20.19.5+dfsg+~cs20.19.24-1
22.*
22.12.0+dfsg-1
22.12.0+dfsg-2
22.12.0+dfsg-3
22.14.0+dfsg-1
22.18.0+dfsg-1
22.18.0+dfsg+~cs22.17.2-1
22.18.0+dfsg+~cs22.17.2-2
22.19.0+dfsg+~cs22.18.0-1
22.21.1+dfsg+~cs22.19.0-1
22.21.1+dfsg+~cs22.19.0-2
22.21.1+dfsg+~cs22.19.0-3
22.21.1+dfsg+~cs22.19.0-4
22.21.1+dfsg+~cs22.19.0-5
22.21.1+dfsg+~cs22.19.0-6
22.22.0+dfsg+~cs22.19.6-1
22.22.0+dfsg+~cs22.19.13-1
22.22.0+dfsg+~cs22.19.13-2
22.22.1+dfsg+~cs22.19.15-1
22.22.2+dfsg+~cs22.19.15-1
22.22.2+dfsg+~cs22.19.15-3
24.*
24.11.1+dfsg+~cs24.10.1-1
24.11.1+dfsg+~cs24.10.1-2
24.12.0+dfsg+~cs24.10.4-1
24.13.0+dfsg+~cs24.10.7-1
24.13.0+dfsg+~cs24.10.7-2
24.14.0+dfsg+~cs24.12.0-1
24.14.0+dfsg+~cs24.12.0-2
24.14.1+dfsg+~cs24.12.0-1
24.15.0+dfsg+~cs24.12.2-1
24.16.0+dfsg+~cs24.13.1-1
24.16.0+dfsg+~cs24.13.1-2
24.17.0+dfsg+~cs24.13.2-1
24.18.0+dfsg+~cs24.13.2-1
24.19.0+dfsg+~cs24.13.3-1
24.20.0+dfsg+~cs24.13.3-1
24.20.0+dfsg+~cs24.13.3-2
24.21.0+dfsg+~cs24.13.4-1
24.22.0+dfsg+~cs24.19.2-1
24.22.0+dfsg+~cs24.19.2-2
24.22.1+dfsg+~cs24.19.2-1
24.22.2+dfsg+~cs24.19.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123866.json"

Debian:14 / nodejs

Package

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

Affected ranges

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

Affected versions

20.*
20.19.2+dfsg-1
20.19.4+dfsg-1
20.19.5+dfsg+~cs20.19.12-1
20.19.5+dfsg+~cs20.19.12-2
20.19.5+dfsg+~cs20.19.12-3
20.19.5+dfsg+~cs20.19.12-4
20.19.5+dfsg+~cs20.19.24-1
22.*
22.12.0+dfsg-1
22.12.0+dfsg-2
22.12.0+dfsg-3
22.14.0+dfsg-1
22.18.0+dfsg-1
22.18.0+dfsg+~cs22.17.2-1
22.18.0+dfsg+~cs22.17.2-2
22.19.0+dfsg+~cs22.18.0-1
22.21.1+dfsg+~cs22.19.0-1
22.21.1+dfsg+~cs22.19.0-2
22.21.1+dfsg+~cs22.19.0-3
22.21.1+dfsg+~cs22.19.0-4
22.21.1+dfsg+~cs22.19.0-5
22.21.1+dfsg+~cs22.19.0-6
22.22.0+dfsg+~cs22.19.6-1
22.22.0+dfsg+~cs22.19.13-1
22.22.0+dfsg+~cs22.19.13-2
22.22.1+dfsg+~cs22.19.15-1
22.22.2+dfsg+~cs22.19.15-1
22.22.2+dfsg+~cs22.19.15-3
24.*
24.11.1+dfsg+~cs24.10.1-1
24.11.1+dfsg+~cs24.10.1-2
24.12.0+dfsg+~cs24.10.4-1
24.13.0+dfsg+~cs24.10.7-1
24.13.0+dfsg+~cs24.10.7-2
24.14.0+dfsg+~cs24.12.0-1
24.14.0+dfsg+~cs24.12.0-2
24.14.1+dfsg+~cs24.12.0-1
24.15.0+dfsg+~cs24.12.2-1
24.16.0+dfsg+~cs24.13.1-1
24.16.0+dfsg+~cs24.13.1-2
24.17.0+dfsg+~cs24.13.2-1
24.18.0+dfsg+~cs24.13.2-1
24.19.0+dfsg+~cs24.13.3-1
24.20.0+dfsg+~cs24.13.3-1
24.20.0+dfsg+~cs24.13.3-2
24.21.0+dfsg+~cs24.13.4-1
24.22.0+dfsg+~cs24.19.2-1
24.22.0+dfsg+~cs24.19.2-2
24.22.1+dfsg+~cs24.19.2-1
24.22.2+dfsg+~cs24.19.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123866.json"