UBUNTU-CVE-2026-27459

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Source

https://ubuntu.com/security/CVE-2026-27459

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27459.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-27459

Upstream

CVE-2026-27459

Downstream

USN-8115-1

Related

USN-8115-1

Published

2026-03-18T00:00:00Z

Modified

2026-03-25T19:49:05.107724Z

Severity

7.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U CVSS Calculator
9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to set_cookie_generate_callback returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Starting in version 26.0.0, cookie values that are too long are now rejected.

References

Affected packages

Ubuntu:24.04:LTS / pyopenssl

Package

Name: pyopenssl
Purl: pkg:deb/ubuntu/pyopenssl@23.2.0-1ubuntu0.1?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

23.2.0-1ubuntu0.1

Affected versions

23.*

23.0.0-1

23.2.0-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "23.2.0-1ubuntu0.1",
            "binary_name": "python3-openssl"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27459.json"

Ubuntu:25.10 / pyopenssl