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Update dependency certifi to v2026.10.18 [SECURITY] - #62
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marcleblanc2
approved these changes
Nov 9, 2026
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This PR contains the following updates:
2026.5.20→2026.10.18Test plan: CI should pass with updated dependencies. No review required: this is an automated dependency update PR.
certifi bundles emSign root CAs with compromised intermediate CA keys
GHSA-6q48-6c7w-9gw2
More information
Details
Certifi versions before 2026.10.18 include the
emSign ECC Root CA - G3root 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,urllib3andpip, 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:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
certifi/python-certifi (certifi)
v2026.10.18Compare Source
v2026.7.22Compare Source
v2026.6.17Compare Source
Configuration
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