UBUNTU-CVE-2026-1526

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Source
https://ubuntu.com/security/CVE-2026-1526
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1526.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-1526
Upstream
Published
2026-03-12T21:16:00Z
Modified
2026-03-19T08:27:46.873972Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit on the decompressed data size. A malicious WebSocket server can send a small compressed frame (a "decompression bomb") that expands to an extremely large size in memory, causing the Node.js process to exhaust available memory and crash or become unresponsive. The vulnerability exists in the PerMessageDeflate.decompress() method, which accumulates all decompressed chunks in memory and concatenates them into a single Buffer without checking whether the total size exceeds a safe threshold.

References

Affected packages

Ubuntu:24.04:LTS / node-undici

Package

Name
node-undici
Purl
pkg:deb/ubuntu/node-undici@5.26.3+dfsg1+~cs23.10.12-2?arch=source&distro=noble

Affected ranges

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

Affected versions

5.*
5.22.1+dfsg1+~cs20.10.10.2-1ubuntu1
5.26.3+dfsg1+~cs23.10.12-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.1.3~5.26.3+dfsg1+~cs23.10.12-2",
            "binary_name": "node-llhttp"
        },
        {
            "binary_version": "5.26.3+dfsg1+~cs23.10.12-2",
            "binary_name": "node-undici"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1526.json"

Ubuntu:25.10 / node-undici

Package

Name
node-undici
Purl
pkg:deb/ubuntu/node-undici@7.3.0+dfsg1+~cs24.12.11-2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.2.1~7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "libllhttp-dev"
        },
        {
            "binary_version": "9.2.1~7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "libllhttp9.2"
        },
        {
            "binary_version": "9.2.1~7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "node-llhttp"
        },
        {
            "binary_version": "7.3.0+dfsg1+~cs24.12.11-2",
            "binary_name": "node-undici"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1526.json"