chore(deps): update dependency pyopenssl to v26 [security] - autoclosed

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
pyOpenSSL (source)	==25.0.0 → ==26.0.0

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pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback

CVE-2026-27448 / GHSA-vp96-hxj8-p424

More information

Details

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.

Unhandled exceptions now result in rejecting the connection.

Credit to Leury Castillo for reporting this issue.

Severity

• CVSS Score: 1.7 / 10 (Low)
• Vector String: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

References

• https://github.com/pyca/pyopenssl/security/advisories/GHSA-vp96-hxj8-p424
• https://github.com/pyca/pyopenssl/commit/d41a814759a9fb49584ca8ab3f7295de49a85aa0
• https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst#L27
• https://nvd.nist.gov/vuln/detail/CVE-2026-27448
• https://github.com/advisories/GHSA-vp96-hxj8-p424

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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pyOpenSSL DTLS cookie callback buffer overflow

CVE-2026-27459 / GHSA-5pwr-322w-8jr4

More information

Details

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.

Cookie values that are too long are now rejected.

Severity

• CVSS Score: 7.2 / 10 (High)
• Vector String: 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

References

• https://github.com/pyca/pyopenssl/security/advisories/GHSA-5pwr-322w-8jr4
• https://github.com/pyca/pyopenssl/commit/57f09bb4bb051d3bc2a1abd36e9525313d5cd408
• https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst
• https://nvd.nist.gov/vuln/detail/CVE-2026-27459
• https://github.com/advisories/GHSA-5pwr-322w-8jr4

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

pyca/pyopenssl (pyOpenSSL)

v26.0.0

Compare Source

Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

• Dropped support for Python 3.7.
• The minimum cryptography version is now 46.0.0.

Deprecations:
^^^^^^^^^^^^^

Changes:
^^^^^^^^

• Added support for using aws-lc instead of OpenSSL.
• Properly raise an error if a DTLS cookie callback returned a cookie longer than DTLS1_COOKIE_LENGTH bytes. Previously this would result in a buffer-overflow. Credit to dark_haxor for reporting the issue. CVE-2026-27459
• Added OpenSSL.SSL.Connection.get_group_name to determine which group name was negotiated.
• Context.set_tlsext_servername_callback now handles exceptions raised in the callback by calling sys.excepthook and returning a fatal TLS alert. Previously, exceptions were silently swallowed and the handshake would proceed as if the callback had succeeded. Credit to Leury Castillo for reporting this issue. CVE-2026-27448

v25.3.0

Compare Source

Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Deprecations:
^^^^^^^^^^^^^

Changes:
^^^^^^^^

• Maximum supported cryptography version is now 46.x.

v25.2.0

Compare Source

Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

• The minimum cryptography version is now 45.0.7.

Deprecations:
^^^^^^^^^^^^^

Changes:
^^^^^^^^

• pyOpenSSL now sets SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER on connections by default, matching CPython's behavior.
• Added OpenSSL.SSL.Context.clear_mode.
• Added OpenSSL.SSL.Context.set_tls13_ciphersuites to set the allowed TLS 1.3 ciphers.
• Added OpenSSL.SSL.Connection.set_info_callback

v25.1.0

Compare Source

Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Deprecations:
^^^^^^^^^^^^^

• Attempting using any methods that mutate an OpenSSL.SSL.Context after it
  has been used to create an OpenSSL.SSL.Connection will emit a warning. In
  a future release, this will raise an exception.

Changes:
^^^^^^^^

• cryptography maximum version has been increased to 45.0.x.

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[gemini-code-assist]

Code Review

This pull request updates the pyOpenSSL dependency from version 25.0.0 to 26.0.0 in the requirements.txt file. There are no review comments to address, and I have no additional feedback to provide.