CVE-2026-27459
2 advisories.
PyPI/pyopenssl CVE-2026-27459: high, EPSS 0.92%
pyOpenSSL DTLS cookie callback buffer overflow
Action: Upgrade pyopenssl to 26.0.0 or later.
pip install pyopenssl==26.0.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 22.0.0 | 26.0.0 | - |
Fixed versions
| 26.0.0 |
Sources
- osv: GHSA-5pwr-322w-8jr4
- https://github.com/pyca/pyopenssl/security/advisories/GHSA-5pwr-322w-8jr4
- https://nvd.nist.gov/vuln/detail/CVE-2026-27459
- https://github.com/pyca/pyopenssl/commit/57f09bb4bb051d3bc2a1abd36e9525313d5cd408
- https://github.com/pyca/pyopenssl
- https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst
CVE-2026-27459 · published · modified · JSON
PyPI/pyopenssl CVE-2026-27459: critical 9.8, EPSS 0.92%
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
Action: Upgrade pyopenssl to 26.0.0 or later.
pip install pyopenssl==26.0.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 22.0.0 | 26.0.0 | - |
Fixed versions
| 26.0.0 |
Sources
- osv: PYSEC-2026-2269
- https://access.redhat.com/security/cve/CVE-2026-27459
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27459.json
- https://access.redhat.com/errata/RHSA-2026:10754
- https://access.redhat.com/errata/RHSA-2026:11856
- https://access.redhat.com/errata/RHSA-2026:11916
- https://access.redhat.com/errata/RHSA-2026:11996
- https://access.redhat.com/errata/RHSA-2026:13508
- https://access.redhat.com/errata/RHSA-2026:13512
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:13553
- https://access.redhat.com/errata/RHSA-2026:14835
- https://access.redhat.com/errata/RHSA-2026:14873
- https://access.redhat.com/errata/RHSA-2026:14874
- https://access.redhat.com/errata/RHSA-2026:19375
- https://access.redhat.com/errata/RHSA-2026:21017
- https://access.redhat.com/errata/RHSA-2026:22465
- https://access.redhat.com/errata/RHSA-2026:24853
- https://access.redhat.com/errata/RHSA-2026:7224
- https://access.redhat.com/errata/RHSA-2026:8437
- https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst
- https://github.com/pyca/pyopenssl/security/advisories/GHSA-5pwr-322w-8jr4
- https://bugzilla.redhat.com/show_bug.cgi?id=2448503
- https://github.com/pyca/pyopenssl/commit/57f09bb4bb051d3bc2a1abd36e9525313d5cd408
CVE-2026-27459 · published · modified · JSON