DEBIAN-CVE-2026-109924

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Source
https://security-tracker.debian.org/tracker/CVE-2026-109924
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109924.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-109924
Upstream
Published
2026-10-15T19:17:22Z
Modified
2026-10-16T06:00:06Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

undici is an HTTP client library for Node.js. In versions 6.5.0 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, its EventSource client can be driven to exhaust process memory by a malicious or compromised Server-Sent Events peer. By sending millions of tiny completed data fields with no blank event separator, or a single unfinished line split across many chunks, the parser retains a growing amount of per-field and per-chunk state that the byte-based maxEventSize and maxResponseSize limits do not bound, and because maxResponseSize is enforced on the compressed body before decompression, a small compressed response can expand into enough retained memory to terminate the process. An application only needs to maintain an EventSource connection to an untrusted peer, which controls only the response, and availability is the only impact. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, which bound the retained parser state independently of the byte limits, and users should upgrade to one of those versions or later. There is no workaround.

References

Affected packages

Debian:12 / node-undici

Package

Name
node-undici
Purl
pkg:deb/debian/node-undici?arch=source&distro=bookworm

Affected ranges

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

Affected versions

5.*
5.15.0+dfsg1+~cs20.10.9.3-1
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u1
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u2
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4
5.19.1+dfsg1+~cs20.10.9.5-1
5.19.1+dfsg1+~cs20.10.9.5-2
5.22.1+dfsg1+~cs20.10.10.2-1
5.26.3+dfsg1+~cs23.10.12-1
5.26.3+dfsg1+~cs23.10.12-2
5.26.3+dfsg1+~cs23.10.12-3
5.28.0+dfsg1+~cs23.11.12.3-1
5.28.0+dfsg1+~cs23.11.12.3-2
5.28.2+dfsg1+~cs23.11.12.3-1
5.28.2+dfsg1+~cs23.11.12.3-2
5.28.2+dfsg1+~cs23.11.12.3-3
5.28.2+dfsg1+~cs23.11.12.3-4
5.28.2+dfsg1+~cs23.11.12.3-5
5.28.2+dfsg1+~cs23.11.12.3-6
5.28.4+dfsg1+~cs23.12.11-1
5.28.4+dfsg1+~cs23.12.11-2
7.*
7.1.0+dfsg1+~cs24.12.10-1
7.2.3+dfsg1+~cs24.12.11-1
7.2.3+dfsg1+~cs24.12.11-2
7.3.0+dfsg1+~cs24.12.11-1
7.3.0+dfsg1+~cs24.12.11-2
7.15.0+dfsg+~cs3.2.0-1
7.15.0+dfsg+~cs3.2.0-3
7.16.0+dfsg+~cs3.2.0-1
7.16.0+dfsg+~cs3.2.0-2
7.18.2+dfsg+~cs3.2.0-1
7.24.5+dfsg+~cs3.2.0-1
7.24.6+dfsg+~cs3.2.0-1
7.24.6+dfsg+~cs3.2.0-2
7.24.6+dfsg+~cs3.2.0-3
8.*
8.5.0+dfsg+~cs3.2.0-1
8.5.0+dfsg+~cs3.2.0-2
8.5.0+dfsg+~cs3.2.0-3
8.9.0+dfsg+~cs3.2.0-1
8.10.2+dfsg+~cs3.2.2-1
8.12.1+dfsg+~cs3.2.3-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109924.json"

Debian:13 / node-undici

Package

Name
node-undici
Purl
pkg:deb/debian/node-undici?arch=source&distro=trixie

Affected ranges

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

Affected versions

7.*
7.3.0+dfsg1+~cs24.12.11-1
7.3.0+dfsg1+~cs24.12.11-2
7.15.0+dfsg+~cs3.2.0-1
7.15.0+dfsg+~cs3.2.0-3
7.16.0+dfsg+~cs3.2.0-1
7.16.0+dfsg+~cs3.2.0-2
7.18.2+dfsg+~cs3.2.0-1
7.24.5+dfsg+~cs3.2.0-1
7.24.6+dfsg+~cs3.2.0-1
7.24.6+dfsg+~cs3.2.0-2
7.24.6+dfsg+~cs3.2.0-3
8.*
8.5.0+dfsg+~cs3.2.0-1
8.5.0+dfsg+~cs3.2.0-2
8.5.0+dfsg+~cs3.2.0-3
8.9.0+dfsg+~cs3.2.0-1
8.10.2+dfsg+~cs3.2.2-1
8.12.1+dfsg+~cs3.2.3-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109924.json"

Debian:14 / node-undici

Package

Name
node-undici
Purl
pkg:deb/debian/node-undici?arch=source&distro=forky

Affected ranges

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

Affected versions

7.*
7.3.0+dfsg1+~cs24.12.11-1
7.3.0+dfsg1+~cs24.12.11-2
7.15.0+dfsg+~cs3.2.0-1
7.15.0+dfsg+~cs3.2.0-3
7.16.0+dfsg+~cs3.2.0-1
7.16.0+dfsg+~cs3.2.0-2
7.18.2+dfsg+~cs3.2.0-1
7.24.5+dfsg+~cs3.2.0-1
7.24.6+dfsg+~cs3.2.0-1
7.24.6+dfsg+~cs3.2.0-2
7.24.6+dfsg+~cs3.2.0-3
8.*
8.5.0+dfsg+~cs3.2.0-1
8.5.0+dfsg+~cs3.2.0-2
8.5.0+dfsg+~cs3.2.0-3
8.9.0+dfsg+~cs3.2.0-1
8.10.2+dfsg+~cs3.2.2-1
8.12.1+dfsg+~cs3.2.3-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109924.json"