USN-8670-3

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Source
https://ubuntu.com/security/notices/USN-8670-3
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8670-3.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-8670-3
Upstream
Published
2026-09-08T17:20:54Z
Modified
2026-09-09T05:42:27Z
Summary
curl vulnerability
Details

USN-8670-1 fixed a vulnerability in curl. This update provides the corresponding update for Ubuntu 26.04 LTS.

Original advisory details:

Joshua Rogers discovered that curl incorrectly handled reusing connections when client certificate settings changed. This could result in the wrong client certificates being used, contrary to expectations.

References

Affected packages

Ubuntu:26.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.18.0-1ubuntu2.5

Affected versions

8.*
8.14.1-2ubuntu1
8.17.0-1ubuntu1
8.18.0-1ubuntu1
8.18.0-1ubuntu2
8.18.0-1ubuntu2.1
8.18.0-1ubuntu2.2
8.18.0-1ubuntu2.3
8.18.0-1ubuntu2.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "8.18.0-1ubuntu2.5"
        },
        {
            "binary_name": "libcurl3t64-gnutls",
            "binary_version": "8.18.0-1ubuntu2.5"
        },
        {
            "binary_name": "libcurl4t64",
            "binary_version": "8.18.0-1ubuntu2.5"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8670-3.json"