VDB
DEBIAN-CVE-2026-27459
DEBIAN-CVE-2026-27459
PUBLISHED
CVSS 9.800000190734863 CRITICAL
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.
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | pyopenssl | 23.2.0-1, 26.1.0-1, 26.0.0-1 |
| Debian:14 | pyopenssl | 25.3.0-2, 0, 25.0.0-1 |
| Debian:13 | pyopenssl | 26.0.0-1, 25.3.0-2, 25.3.0-1 |
Exploit Intelligence
- image-exceptions.yaml (github-poc)
Timeline
- Mar 18, 2026 CVE Published
- Apr 28, 2026 CVE Updated