DEBIAN-CVE-2026-27459

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Source
https://security-tracker.debian.org/tracker/CVE-2026-27459
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27459.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-27459
Upstream
Published
2026-03-18T00:16:19.273Z
Modified
2026-04-13T19:00:10.772456Z
Severity
  • 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
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

Debian:12 / pyopenssl

Package

Name
pyopenssl
Purl
pkg:deb/debian/pyopenssl?arch=source

Affected ranges

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

Affected versions

23.*
23.0.0-1
23.2.0-1
24.*
24.0.0-1
24.0.0-2
24.0.0-3
24.0.0-4
24.0.0-5
24.1.0-1
24.2.1-1
24.3.0-1
25.*
25.0.0-1
25.1.0-1
25.1.0-2
25.3.0-1
25.3.0-2
26.*
26.0.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27459.json"

Debian:13 / pyopenssl

Package

Name
pyopenssl
Purl
pkg:deb/debian/pyopenssl?arch=source

Affected ranges

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

Affected versions

25.*
25.0.0-1
25.1.0-1
25.1.0-2
25.3.0-1
25.3.0-2
26.*
26.0.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27459.json"

Debian:14 / pyopenssl

Package

Name
pyopenssl
Purl
pkg:deb/debian/pyopenssl?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
26.0.0-1

Affected versions

25.*
25.0.0-1
25.1.0-1
25.1.0-2
25.3.0-1
25.3.0-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27459.json"