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4 vulnerabilities found for pyopenssl by pyca
CVE-2026-27459 (GCVE-0-2026-27459)
Vulnerability from nvd – Published: 2026-03-17 23:34 – Updated: 2026-07-01 12:04
VLAI
Title
pyOpenSSL DTLS cookie callback buffer overflow
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
23 references
Impacted products
31 products
| Vendor | Product | Version | |
|---|---|---|---|
| pyca | pyopenssl |
Affected:
>= 22.0.0, < 26.0.0
|
|
| Red Hat | Red Hat Ansible Automation Platform 2.5 for RHEL 8 |
cpe:/a:redhat:ansible_automation_platform:2.5::el8 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8 |
|
| Red Hat | RHUI 4 for RHEL 8 |
cpe:/a:redhat:rhui:4::el8 |
|
| Red Hat | Red Hat Satellite 6.16 for RHEL 8 |
cpe:/a:redhat:satellite:6.16::el8 cpe:/a:redhat:satellite_capsule:6.16::el8 cpe:/a:redhat:satellite_utils:6.16::el8 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.5 for RHEL 9 |
cpe:/a:redhat:ansible_automation_platform:2.5::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 for RHEL 9 |
cpe:/a:redhat:ansible_automation_platform:2.6::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9 |
|
| Red Hat | Red Hat Satellite 6.16 for RHEL 9 |
cpe:/a:redhat:satellite:6.16::el9 cpe:/a:redhat:satellite_capsule:6.16::el9 cpe:/a:redhat:satellite_utils:6.16::el9 |
|
| Red Hat | Red Hat Satellite 6.17 for RHEL 9 |
cpe:/a:redhat:satellite:6.17::el9 cpe:/a:redhat:satellite_capsule:6.17::el9 cpe:/a:redhat:satellite_utils:6.17::el9 |
|
| Red Hat | Red Hat Satellite 6.18 for RHEL 9 |
cpe:/a:redhat:satellite:6.18::el9 cpe:/a:redhat:satellite_capsule:6.18::el9 cpe:/a:redhat:satellite_maintenance:6.18::el9 cpe:/a:redhat:satellite_utils:6.18::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.5 |
cpe:/a:redhat:ansible_automation_platform:2.5::el8 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 |
cpe:/a:redhat:ansible_automation_platform:2.6::el9 |
|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Quay 3.10 |
cpe:/a:redhat:quay:3.10::el8 |
|
| Red Hat | Red Hat Quay 3.12 |
cpe:/a:redhat:quay:3.12::el8 |
|
| Red Hat | Red Hat Quay 3.14 |
cpe:/a:redhat:quay:3.14::el8 |
|
| Red Hat | Red Hat Quay 3.15 |
cpe:/a:redhat:quay:3.15::el8 |
|
| Red Hat | Red Hat Quay 3.16 |
cpe:/a:redhat:quay:3.16::el9 |
|
| Red Hat | Red Hat Quay 3.17 |
cpe:/a:redhat:quay:3.17::el9 |
|
| Red Hat | Red Hat Quay 3.9 |
cpe:/a:redhat:quay:3.9::el8 |
|
| Red Hat | Red Hat Trusted Artifact Signer 1.4 |
cpe:/a:redhat:trusted_artifact_signer:1.4::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2 |
|
| Red Hat | Red Hat Ansible Automation Platform Ansible Core 2 |
cpe:/a:redhat:ansible_core:2 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 for RHEL 10 |
cpe:/a:redhat:ansible_automation_platform:2.6::el10 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat OpenStack Platform 17.1 |
cpe:/a:redhat:openstack:17.1 |
|
| Red Hat | Red Hat OpenStack Platform 18.0 |
cpe:/a:redhat:openstack:18.0 |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
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CVE-2026-27448 (GCVE-0-2026-27448)
Vulnerability from nvd – Published: 2026-03-17 23:24 – Updated: 2026-03-18 20:18
VLAI
Title
pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback
Summary
pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it. Starting in version 26.0.0, unhandled exceptions now result in rejecting the connection.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-636 - Not Failing Securely ('Failing Open')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/pyca/pyopenssl/security/adviso… | x_refsource_CONFIRM |
| https://github.com/pyca/pyopenssl/commit/d41a8147… | x_refsource_MISC |
| https://github.com/pyca/pyopenssl/blob/358cbf29c4… | x_refsource_MISC |
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CVE-2026-27459 (GCVE-0-2026-27459)
Vulnerability from cvelistv5 – Published: 2026-03-17 23:34 – Updated: 2026-07-01 12:04
VLAI
Title
pyOpenSSL DTLS cookie callback buffer overflow
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
23 references
Impacted products
31 products
| Vendor | Product | Version | |
|---|---|---|---|
| pyca | pyopenssl |
Affected:
>= 22.0.0, < 26.0.0
|
|
| Red Hat | Red Hat Ansible Automation Platform 2.5 for RHEL 8 |
cpe:/a:redhat:ansible_automation_platform:2.5::el8 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8 |
|
| Red Hat | RHUI 4 for RHEL 8 |
cpe:/a:redhat:rhui:4::el8 |
|
| Red Hat | Red Hat Satellite 6.16 for RHEL 8 |
cpe:/a:redhat:satellite:6.16::el8 cpe:/a:redhat:satellite_capsule:6.16::el8 cpe:/a:redhat:satellite_utils:6.16::el8 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.5 for RHEL 9 |
cpe:/a:redhat:ansible_automation_platform:2.5::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 for RHEL 9 |
cpe:/a:redhat:ansible_automation_platform:2.6::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9 |
|
| Red Hat | Red Hat Satellite 6.16 for RHEL 9 |
cpe:/a:redhat:satellite:6.16::el9 cpe:/a:redhat:satellite_capsule:6.16::el9 cpe:/a:redhat:satellite_utils:6.16::el9 |
|
| Red Hat | Red Hat Satellite 6.17 for RHEL 9 |
cpe:/a:redhat:satellite:6.17::el9 cpe:/a:redhat:satellite_capsule:6.17::el9 cpe:/a:redhat:satellite_utils:6.17::el9 |
|
| Red Hat | Red Hat Satellite 6.18 for RHEL 9 |
cpe:/a:redhat:satellite:6.18::el9 cpe:/a:redhat:satellite_capsule:6.18::el9 cpe:/a:redhat:satellite_maintenance:6.18::el9 cpe:/a:redhat:satellite_utils:6.18::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.5 |
cpe:/a:redhat:ansible_automation_platform:2.5::el8 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 |
cpe:/a:redhat:ansible_automation_platform:2.6::el9 |
|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Quay 3.10 |
cpe:/a:redhat:quay:3.10::el8 |
|
| Red Hat | Red Hat Quay 3.12 |
cpe:/a:redhat:quay:3.12::el8 |
|
| Red Hat | Red Hat Quay 3.14 |
cpe:/a:redhat:quay:3.14::el8 |
|
| Red Hat | Red Hat Quay 3.15 |
cpe:/a:redhat:quay:3.15::el8 |
|
| Red Hat | Red Hat Quay 3.16 |
cpe:/a:redhat:quay:3.16::el9 |
|
| Red Hat | Red Hat Quay 3.17 |
cpe:/a:redhat:quay:3.17::el9 |
|
| Red Hat | Red Hat Quay 3.9 |
cpe:/a:redhat:quay:3.9::el8 |
|
| Red Hat | Red Hat Trusted Artifact Signer 1.4 |
cpe:/a:redhat:trusted_artifact_signer:1.4::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2 |
|
| Red Hat | Red Hat Ansible Automation Platform Ansible Core 2 |
cpe:/a:redhat:ansible_core:2 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 for RHEL 10 |
cpe:/a:redhat:ansible_automation_platform:2.6::el10 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat OpenStack Platform 17.1 |
cpe:/a:redhat:openstack:17.1 |
|
| Red Hat | Red Hat OpenStack Platform 18.0 |
cpe:/a:redhat:openstack:18.0 |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
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CVE-2026-27448 (GCVE-0-2026-27448)
Vulnerability from cvelistv5 – Published: 2026-03-17 23:24 – Updated: 2026-03-18 20:18
VLAI
Title
pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback
Summary
pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it. Starting in version 26.0.0, unhandled exceptions now result in rejecting the connection.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-636 - Not Failing Securely ('Failing Open')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/pyca/pyopenssl/security/adviso… | x_refsource_CONFIRM |
| https://github.com/pyca/pyopenssl/commit/d41a8147… | x_refsource_MISC |
| https://github.com/pyca/pyopenssl/blob/358cbf29c4… | x_refsource_MISC |
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