[ll-renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
certifi	pre-commit-python	minor	==2026.7.22 → ==2026.10.19

Note: The pre-commit manager in Renovate is not supported by the pre-commit maintainers or community. Please do not report any problems there, instead create a Discussion in the Renovate repository if you have any questions.

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certifi bundles emSign root CAs with compromised intermediate CA keys

GHSA-6q48-6c7w-9gw2 / PYSEC-2026-4320

More information

Details

Certifi versions before 2026.10.18 include the emSign ECC Root CA - G3 root certificate in their bundled CA store. Eight eMudhra intermediate CA certificates that chain to this root have compromised private keys and the CA has revoked them.

An attacker with one of the compromised keys can issue valid-looking certificates for any hostname. If the attacker is also on-path, they can intercept or modify TLS traffic from clients that trust the certifi bundle. Examples include requests, urllib3 and pip, and the Python.org macOS installer.

Certifi 2026.10.18 removed all emSign roots from the bundle. Certifi 2026.10.19 restored the emSign roots that are not affected. Upgrade to 2026.10.19 or later, and rebuild container images that vendor certifi.

Severity

• CVSS Score: 9.1 / 10 (Critical)
• Vector String: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

• https://github.com/certifi/python-certifi/security/advisories/GHSA-6q48-6c7w-9gw2
• https://discuss.python.org/t/information-for-python-users-regarding-emudhra-emsign-ca-certificate-security-incident/109576
• https://emudhra.we-have-a-problem.com
• https://github.com/certifi/python-certifi

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

---

certifi bundles emSign root CAs with compromised intermediate CA keys

GHSA-6q48-6c7w-9gw2 / PYSEC-2026-4320

More information

Details

Certifi versions before 2026.10.18 include the emSign ECC Root CA - G3 root certificate in their bundled CA store. Eight eMudhra intermediate CA certificates that chain to this root have compromised private keys and the CA has revoked them.

An attacker with one of the compromised keys can issue valid-looking certificates for any hostname. If the attacker is also on-path, they can intercept or modify TLS traffic from clients that trust the certifi bundle. Examples include requests, urllib3 and pip, and the Python.org macOS installer.

Certifi 2026.10.18 removed all emSign roots from the bundle. Certifi 2026.10.19 restored the emSign roots that are not affected. Upgrade to 2026.10.19 or later, and rebuild container images that vendor certifi.

Severity

• CVSS Score: 9.1 / 10 (Critical)
• Vector String: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

• https://github.com/certifi/python-certifi/security/advisories/GHSA-6q48-6c7w-9gw2
• https://discuss.python.org/t/information-for-python-users-regarding-emudhra-emsign-ca-certificate-security-incident/109576
• https://emudhra.we-have-a-problem.com
• https://github.com/certifi/python-certifi
• https://pypi.org/project/certifi
• https://github.com/advisories/GHSA-6q48-6c7w-9gw2

This data is provided by OSV and the PyPI Advisory Database (CC-BY 4.0).

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Release Notes

certifi/python-certifi (certifi)

v2026.10.19

Compare Source

v2026.10.18

Compare Source

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (ea170a1) to head (ae90759).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #337   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          190       190           
  Lines        12729     12729           
  Branches       520       520           
=========================================
  Hits         12729     12729           

Flag	Coverage Δ
bench_harness	31.12% <ø> (ø)
dev	77.50% <ø> (ø)
examples-beat	100.00% <ø> (ø)
examples-pg_cron	100.00% <ø> (ø)
examples-web	100.00% <ø> (ø)
py312-django60	77.36% <ø> (ø)
py312-django61	77.34% <ø> (ø)
py314-django61	77.36% <ø> (ø)

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